What is the general solution for tan(2x+10)=cot(x-40) ?

The general solution for tan(2x+10)=cot(x-40) is x=40+(360n)/3

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tan(2x+10)=cot(x-40)

Solution

tan (2 x + 1 0^{\circ}) = cot (x - 4 0^{\circ})

Solution

x = 4 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

Radians

x = \frac{2 π}{9} + \frac{2 π}{3} n

Solution steps

tan (2 x + 1 0^{\circ}) = cot (x - 4 0^{\circ})

Subtract

cot (x - 4 0^{\circ})

from both sides

tan (2 x + 1 0^{\circ}) - cot (x - 4 0^{\circ}) = 0

Simplify

tan (2 x + 1 0^{\circ}) - cot (x - 4 0^{\circ}) : tan (\frac{36 x + 18 0 ^{\circ}}{18}) - cot (\frac{9 x - 36 0 ^{\circ}}{9})

tan (2 x + 1 0^{\circ}) - cot (x - 4 0^{\circ})

Join

2 x + 1 0^{\circ} : \frac{36 x + 18 0 ^{\circ}}{18}

2 x + 1 0^{\circ}

Convert element to fraction:

2 x = \frac{2 x 18}{18}

= \frac{2 x \cdot 18}{18} + 1 0^{\circ}

Since the denominators are equal, combine the fractions:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{2 x \cdot 18 + 18 0 ^{\circ}}{18}

Multiply the numbers:

2 \cdot 18 = 36

= \frac{36 x + 18 0 ^{\circ}}{18}

= tan (\frac{36 x + 18 0 ^{\circ}}{18}) - cot (x - 4 0^{\circ})

Join

x - 4 0^{\circ} : \frac{9 x - 36 0 ^{\circ}}{9}

x - 4 0^{\circ}

Convert element to fraction:

x = \frac{x 9}{9}

= \frac{x \cdot 9}{9} - 4 0^{\circ}

Since the denominators are equal, combine the fractions:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{x \cdot 9 - 36 0 ^{\circ}}{9}

= tan (\frac{36 x + 18 0 ^{\circ}}{18}) - cot (\frac{9 x - 36 0 ^{\circ}}{9})

tan (\frac{36 x + 18 0 ^{\circ}}{18}) - cot (\frac{9 x - 36 0 ^{\circ}}{9}) = 0

Express with sin, cos

- cot (\frac{- 36 0 ^{\circ} + 9 x}{9}) + tan (\frac{18 0 ^{\circ} + 36 x}{18})

Use the basic trigonometric identity:

cot (x) = \frac{cos ( x )}{sin ( x )}

= - \frac{cos ( \frac{- 36 0 ^{\circ} + 9 x}{9} )}{sin ( \frac{- 36 0 ^{\circ} + 9 x}{9} )} + tan (\frac{18 0 ^{\circ} + 36 x}{18})

Use the basic trigonometric identity:

tan (x) = \frac{sin ( x )}{cos ( x )}

= - \frac{cos ( \frac{- 36 0 ^{\circ} + 9 x}{9} )}{sin ( \frac{- 36 0 ^{\circ} + 9 x}{9} )} + \frac{sin ( \frac{18 0 ^{\circ} + 36 x}{18} )}{cos ( \frac{18 0 ^{\circ} + 36 x}{18} )}

Simplify

- \frac{cos ( \frac{- 36 0 ^{\circ} + 9 x}{9} )}{sin ( \frac{- 36 0 ^{\circ} + 9 x}{9} )} + \frac{sin ( \frac{18 0 ^{\circ} + 36 x}{18} )}{cos ( \frac{18 0 ^{\circ} + 36 x}{18} )} : \frac{- cos ( \frac{- 36 0 ^{\circ} + 9 x}{9} ) cos ( \frac{36 x + 18 0 ^{\circ}}{18} ) + sin ( \frac{18 0 ^{\circ} + 36 x}{18} ) sin ( \frac{9 x - 36 0 ^{\circ}}{9} )}{sin ( \frac{9 x - 36 0 ^{\circ}}{9} ) cos ( \frac{36 x + 18 0 ^{\circ}}{18} )}

- \frac{cos ( \frac{- 36 0 ^{\circ} + 9 x}{9} )}{sin ( \frac{- 36 0 ^{\circ} + 9 x}{9} )} + \frac{sin ( \frac{18 0 ^{\circ} + 36 x}{18} )}{cos ( \frac{18 0 ^{\circ} + 36 x}{18} )}

Least Common Multiplier of

sin (\frac{- 36 0 ^{\circ} + 9 x}{9}), cos (\frac{18 0 ^{\circ} + 36 x}{18}) : sin (\frac{9 x - 36 0 ^{\circ}}{9}) cos (\frac{36 x + 18 0 ^{\circ}}{18})

sin (\frac{- 36 0 ^{\circ} + 9 x}{9}), cos (\frac{18 0 ^{\circ} + 36 x}{18})

Lowest Common Multiplier (LCM)

Compute an expression comprised of factors that appear either in

sin (\frac{- 36 0 ^{\circ} + 9 x}{9})

cos (\frac{18 0 ^{\circ} + 36 x}{18})

= sin (\frac{9 x - 36 0 ^{\circ}}{9}) cos (\frac{36 x + 18 0 ^{\circ}}{18})

Adjust Fractions based on the LCM

Multiply each numerator by the same amount needed to multiply its

corresponding denominator to turn it into the LCM

sin (\frac{9 x - 36 0 ^{\circ}}{9}) cos (\frac{36 x + 18 0 ^{\circ}}{18})

For

\frac{cos ( \frac{- 36 0 ^{\circ} + 9 x}{9} )}{sin ( \frac{- 36 0 ^{\circ} + 9 x}{9} )} :

multiply the denominator and numerator by

cos (\frac{36 x + 18 0 ^{\circ}}{18})

\frac{cos ( \frac{- 36 0 ^{\circ} + 9 x}{9} )}{sin ( \frac{- 36 0 ^{\circ} + 9 x}{9} )} = \frac{cos ( \frac{- 36 0 ^{\circ} + 9 x}{9} ) cos ( \frac{36 x + 18 0 ^{\circ}}{18} )}{sin ( \frac{- 36 0 ^{\circ} + 9 x}{9} ) cos ( \frac{36 x + 18 0 ^{\circ}}{18} )}

For

\frac{sin ( \frac{18 0 ^{\circ} + 36 x}{18} )}{cos ( \frac{18 0 ^{\circ} + 36 x}{18} )} :

multiply the denominator and numerator by

sin (\frac{9 x - 36 0 ^{\circ}}{9})

\frac{sin ( \frac{18 0 ^{\circ} + 36 x}{18} )}{cos ( \frac{18 0 ^{\circ} + 36 x}{18} )} = \frac{sin ( \frac{18 0 ^{\circ} + 36 x}{18} ) sin ( \frac{9 x - 36 0 ^{\circ}}{9} )}{cos ( \frac{18 0 ^{\circ} + 36 x}{18} ) sin ( \frac{9 x - 36 0 ^{\circ}}{9} )}

= - \frac{cos ( \frac{- 36 0 ^{\circ} + 9 x}{9} ) cos ( \frac{36 x + 18 0 ^{\circ}}{18} )}{sin ( \frac{- 36 0 ^{\circ} + 9 x}{9} ) cos ( \frac{36 x + 18 0 ^{\circ}}{18} )} + \frac{sin ( \frac{18 0 ^{\circ} + 36 x}{18} ) sin ( \frac{9 x - 36 0 ^{\circ}}{9} )}{cos ( \frac{18 0 ^{\circ} + 36 x}{18} ) sin ( \frac{9 x - 36 0 ^{\circ}}{9} )}

Since the denominators are equal, combine the fractions:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{- cos ( \frac{- 36 0 ^{\circ} + 9 x}{9} ) cos ( \frac{36 x + 18 0 ^{\circ}}{18} ) + sin ( \frac{18 0 ^{\circ} + 36 x}{18} ) sin ( \frac{9 x - 36 0 ^{\circ}}{9} )}{sin ( \frac{9 x - 36 0 ^{\circ}}{9} ) cos ( \frac{36 x + 18 0 ^{\circ}}{18} )}

= \frac{- cos ( \frac{- 36 0 ^{\circ} + 9 x}{9} ) cos ( \frac{36 x + 18 0 ^{\circ}}{18} ) + sin ( \frac{18 0 ^{\circ} + 36 x}{18} ) sin ( \frac{9 x - 36 0 ^{\circ}}{9} )}{sin ( \frac{9 x - 36 0 ^{\circ}}{9} ) cos ( \frac{36 x + 18 0 ^{\circ}}{18} )}

\frac{- cos ( \frac{- 36 0 ^{\circ} + 9 x}{9} ) cos ( \frac{18 0 ^{\circ} + 36 x}{18} ) + sin ( \frac{- 36 0 ^{\circ} + 9 x}{9} ) sin ( \frac{18 0 ^{\circ} + 36 x}{18} )}{cos ( \frac{18 0 ^{\circ} + 36 x}{18} ) sin ( \frac{- 36 0 ^{\circ} + 9 x}{9} )} = 0

\frac{f ( x )}{g ( x )} = 0 \Rightarrow f (x) = 0

- cos (\frac{- 36 0 ^{\circ} + 9 x}{9}) cos (\frac{18 0 ^{\circ} + 36 x}{18}) + sin (\frac{- 36 0 ^{\circ} + 9 x}{9}) sin (\frac{18 0 ^{\circ} + 36 x}{18}) = 0

Rewrite using trig identities

- cos (\frac{- 36 0 ^{\circ} + 9 x}{9}) cos (\frac{18 0 ^{\circ} + 36 x}{18}) + sin (\frac{- 36 0 ^{\circ} + 9 x}{9}) sin (\frac{18 0 ^{\circ} + 36 x}{18})

Use the Angle Sum identity:

cos (s) cos (t) - sin (s) sin (t) = cos (s + t)

- cos (s) cos (t) + sin (s) sin (t) = - cos (s + t)

= - cos (\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18})

- cos (\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18}) = 0

Divide both sides by

- 1

- cos (\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18}) = 0

Divide both sides by

- 1

\frac{- cos ( \frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18} )}{- 1} = \frac{0}{- 1}

Simplify

cos (\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18}) = 0

cos (\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18}) = 0

General solutions for

cos (\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18}) = 0

cos (x)

periodicity table with

36 0^{\circ} n

cycle:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18} = 9 0^{\circ} + 36 0^{\circ} n, \frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18} = 27 0^{\circ} + 36 0^{\circ} n

\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18} = 9 0^{\circ} + 36 0^{\circ} n, \frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18} = 27 0^{\circ} + 36 0^{\circ} n

Solve

\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18} = 9 0^{\circ} + 36 0^{\circ} n : x = 4 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18} = 9 0^{\circ} + 36 0^{\circ} n

Multiply by LCM

\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18} = 9 0^{\circ} + 36 0^{\circ} n

Find Least Common Multiplier of

9, 18, 2 : 18

9, 18, 2

Least Common Multiplier (LCM)

Prime factorization of

9 : 3 \cdot 3

9

9

divides by

39 = 3 \cdot 3

= 3 \cdot 3

Prime factorization of

18 : 2 \cdot 3 \cdot 3

18

18

divides by

218 = 9 \cdot 2

= 2 \cdot 9

9

divides by

39 = 3 \cdot 3

= 2 \cdot 3 \cdot 3

2, 3

are all prime numbers, therefore no further factorization is possible

= 2 \cdot 3 \cdot 3

Prime factorization of

2 : 2

2

2

is a prime number, therefore no factorization is possible

= 2

Compute a number comprised of factors that appear in at least one of the following:

9, 18, 2

= 3 \cdot 3 \cdot 2

Multiply the numbers:

3 \cdot 3 \cdot 2 = 18

= 18

Multiply by LCM=

18

\frac{- 36 0 ^{\circ} + 9 x}{9} \cdot 18 + \frac{18 0 ^{\circ} + 36 x}{18} \cdot 18 = 9 0^{\circ} \cdot 18 + 36 0^{\circ} n \cdot 18

Simplify

\frac{- 36 0 ^{\circ} + 9 x}{9} \cdot 18 + \frac{18 0 ^{\circ} + 36 x}{18} \cdot 18 = 9 0^{\circ} \cdot 18 + 36 0^{\circ} n \cdot 18

Simplify

\frac{- 36 0 ^{\circ} + 9 x}{9} \cdot 18 : 2 (9 x - 36 0^{\circ})

\frac{- 36 0 ^{\circ} + 9 x}{9} \cdot 18

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{( - 36 0 ^{\circ} + 9 x ) \cdot 18}{9}

Divide the numbers:

\frac{18}{9} = 2

= 2 (9 x - 36 0^{\circ})

Simplify

\frac{18 0 ^{\circ} + 36 x}{18} \cdot 18 : 18 0^{\circ} + 36 x

\frac{18 0 ^{\circ} + 36 x}{18} \cdot 18

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{( 18 0 ^{\circ} + 36 x ) \cdot 18}{18}

Cancel the common factor:

18

= 18 0^{\circ} + 36 x

Simplify

9 0^{\circ} \cdot 18 : 162 0^{\circ}

9 0^{\circ} \cdot 18

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= 162 0^{\circ}

Divide the numbers:

\frac{18}{2} = 9

= 162 0^{\circ}

Simplify

36 0^{\circ} n \cdot 18 : 648 0^{\circ} n

36 0^{\circ} n \cdot 18

Multiply the numbers:

2 \cdot 18 = 36

= 648 0^{\circ} n

2 (9 x - 36 0^{\circ}) + 18 0^{\circ} + 36 x = 162 0^{\circ} + 648 0^{\circ} n

2 (9 x - 36 0^{\circ}) + 18 0^{\circ} + 36 x = 162 0^{\circ} + 648 0^{\circ} n

2 (9 x - 36 0^{\circ}) + 18 0^{\circ} + 36 x = 162 0^{\circ} + 648 0^{\circ} n

Expand

2 (9 x - 36 0^{\circ}) + 18 0^{\circ} + 36 x : 54 x - 54 0^{\circ}

2 (9 x - 36 0^{\circ}) + 18 0^{\circ} + 36 x

Expand

2 (9 x - 36 0^{\circ}) : 18 x - 72 0^{\circ}

2 (9 x - 36 0^{\circ})

Apply the distributive law:

a (b - c) = ab - a c

a = 2, b = 9 x, c = 36 0^{\circ}

= 2 \cdot 9 x - 2 \cdot 36 0^{\circ}

Simplify

2 \cdot 9 x - 2 \cdot 36 0^{\circ} : 18 x - 72 0^{\circ}

2 \cdot 9 x - 2 \cdot 36 0^{\circ}

Multiply the numbers:

2 \cdot 9 = 18

= 18 x - 2 \cdot 36 0^{\circ}

Multiply the numbers:

2 \cdot 2 = 4

= 18 x - 72 0^{\circ}

= 18 x - 72 0^{\circ}

= 18 x - 72 0^{\circ} + 18 0^{\circ} + 36 x

Simplify

18 x - 72 0^{\circ} + 18 0^{\circ} + 36 x : 54 x - 54 0^{\circ}

18 x - 72 0^{\circ} + 18 0^{\circ} + 36 x

Group like terms

= 18 x + 36 x - 72 0^{\circ} + 18 0^{\circ}

Add similar elements:

18 x + 36 x = 54 x

= 54 x - 72 0^{\circ} + 18 0^{\circ}

Add similar elements:

- 72 0^{\circ} + 18 0^{\circ} = - 54 0^{\circ}

= 54 x - 54 0^{\circ}

= 54 x - 54 0^{\circ}

54 x - 54 0^{\circ} = 162 0^{\circ} + 648 0^{\circ} n

Move

54 0^{\circ}

to the right side

54 x - 54 0^{\circ} = 162 0^{\circ} + 648 0^{\circ} n

Add

54 0^{\circ}

to both sides

54 x - 54 0^{\circ} + 54 0^{\circ} = 162 0^{\circ} + 648 0^{\circ} n + 54 0^{\circ}

Simplify

54 x = 216 0^{\circ} + 648 0^{\circ} n

54 x = 216 0^{\circ} + 648 0^{\circ} n

Divide both sides by

54

54 x = 216 0^{\circ} + 648 0^{\circ} n

Divide both sides by

54

\frac{54 x}{54} = 4 0^{\circ} + \frac{648 0 ^{\circ} n}{54}

Simplify

\frac{54 x}{54} = 4 0^{\circ} + \frac{648 0 ^{\circ} n}{54}

Simplify

\frac{54 x}{54} : x

\frac{54 x}{54}

Divide the numbers:

\frac{54}{54} = 1

= x

Simplify

4 0^{\circ} + \frac{648 0 ^{\circ} n}{54} : 4 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

4 0^{\circ} + \frac{648 0 ^{\circ} n}{54}

Cancel

4 0^{\circ} : 4 0^{\circ}

4 0^{\circ}

Cancel the common factor:

6

= 4 0^{\circ}

= 4 0^{\circ} + \frac{648 0 ^{\circ} n}{54}

Cancel

\frac{648 0 ^{\circ} n}{54} : \frac{36 0 ^{\circ} n}{3}

\frac{648 0 ^{\circ} n}{54}

Cancel the common factor:

18

= \frac{36 0 ^{\circ} n}{3}

= 4 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

x = 4 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

x = 4 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

x = 4 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

Solve

\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18} = 27 0^{\circ} + 36 0^{\circ} n : x = 10 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18} = 27 0^{\circ} + 36 0^{\circ} n

Multiply by LCM

\frac{- 36 0 ^{\circ} + 9 x}{9} + \frac{18 0 ^{\circ} + 36 x}{18} = 27 0^{\circ} + 36 0^{\circ} n

Find Least Common Multiplier of

9, 18, 2 : 18

9, 18, 2

Least Common Multiplier (LCM)

Prime factorization of

9 : 3 \cdot 3

9

9

divides by

39 = 3 \cdot 3

= 3 \cdot 3

Prime factorization of

18 : 2 \cdot 3 \cdot 3

18

18

divides by

218 = 9 \cdot 2

= 2 \cdot 9

9

divides by

39 = 3 \cdot 3

= 2 \cdot 3 \cdot 3

2, 3

are all prime numbers, therefore no further factorization is possible

= 2 \cdot 3 \cdot 3

Prime factorization of

2 : 2

2

2

is a prime number, therefore no factorization is possible

= 2

Compute a number comprised of factors that appear in at least one of the following:

9, 18, 2

= 3 \cdot 3 \cdot 2

Multiply the numbers:

3 \cdot 3 \cdot 2 = 18

= 18

Multiply by LCM=

18

\frac{- 36 0 ^{\circ} + 9 x}{9} \cdot 18 + \frac{18 0 ^{\circ} + 36 x}{18} \cdot 18 = 27 0^{\circ} \cdot 18 + 36 0^{\circ} n \cdot 18

Simplify

\frac{- 36 0 ^{\circ} + 9 x}{9} \cdot 18 + \frac{18 0 ^{\circ} + 36 x}{18} \cdot 18 = 27 0^{\circ} \cdot 18 + 36 0^{\circ} n \cdot 18

Simplify

\frac{- 36 0 ^{\circ} + 9 x}{9} \cdot 18 : 2 (9 x - 36 0^{\circ})

\frac{- 36 0 ^{\circ} + 9 x}{9} \cdot 18

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{( - 36 0 ^{\circ} + 9 x ) \cdot 18}{9}

Divide the numbers:

\frac{18}{9} = 2

= 2 (9 x - 36 0^{\circ})

Simplify

\frac{18 0 ^{\circ} + 36 x}{18} \cdot 18 : 18 0^{\circ} + 36 x

\frac{18 0 ^{\circ} + 36 x}{18} \cdot 18

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{( 18 0 ^{\circ} + 36 x ) \cdot 18}{18}

Cancel the common factor:

18

= 18 0^{\circ} + 36 x

Simplify

27 0^{\circ} \cdot 18 : 486 0^{\circ}

27 0^{\circ} \cdot 18

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= 486 0^{\circ}

Multiply the numbers:

3 \cdot 18 = 54

= 486 0^{\circ}

Divide the numbers:

\frac{54}{2} = 27

= 486 0^{\circ}

Simplify

36 0^{\circ} n \cdot 18 : 648 0^{\circ} n

36 0^{\circ} n \cdot 18

Multiply the numbers:

2 \cdot 18 = 36

= 648 0^{\circ} n

2 (9 x - 36 0^{\circ}) + 18 0^{\circ} + 36 x = 486 0^{\circ} + 648 0^{\circ} n

2 (9 x - 36 0^{\circ}) + 18 0^{\circ} + 36 x = 486 0^{\circ} + 648 0^{\circ} n

2 (9 x - 36 0^{\circ}) + 18 0^{\circ} + 36 x = 486 0^{\circ} + 648 0^{\circ} n

Expand

2 (9 x - 36 0^{\circ}) + 18 0^{\circ} + 36 x : 54 x - 54 0^{\circ}

2 (9 x - 36 0^{\circ}) + 18 0^{\circ} + 36 x

Expand

2 (9 x - 36 0^{\circ}) : 18 x - 72 0^{\circ}

2 (9 x - 36 0^{\circ})

Apply the distributive law:

a (b - c) = ab - a c

a = 2, b = 9 x, c = 36 0^{\circ}

= 2 \cdot 9 x - 2 \cdot 36 0^{\circ}

Simplify

2 \cdot 9 x - 2 \cdot 36 0^{\circ} : 18 x - 72 0^{\circ}

2 \cdot 9 x - 2 \cdot 36 0^{\circ}

Multiply the numbers:

2 \cdot 9 = 18

= 18 x - 2 \cdot 36 0^{\circ}

Multiply the numbers:

2 \cdot 2 = 4

= 18 x - 72 0^{\circ}

= 18 x - 72 0^{\circ}

= 18 x - 72 0^{\circ} + 18 0^{\circ} + 36 x

Simplify

18 x - 72 0^{\circ} + 18 0^{\circ} + 36 x : 54 x - 54 0^{\circ}

18 x - 72 0^{\circ} + 18 0^{\circ} + 36 x

Group like terms

= 18 x + 36 x - 72 0^{\circ} + 18 0^{\circ}

Add similar elements:

18 x + 36 x = 54 x

= 54 x - 72 0^{\circ} + 18 0^{\circ}

Add similar elements:

- 72 0^{\circ} + 18 0^{\circ} = - 54 0^{\circ}

= 54 x - 54 0^{\circ}

= 54 x - 54 0^{\circ}

54 x - 54 0^{\circ} = 486 0^{\circ} + 648 0^{\circ} n

Move

54 0^{\circ}

to the right side

54 x - 54 0^{\circ} = 486 0^{\circ} + 648 0^{\circ} n

Add

54 0^{\circ}

to both sides

54 x - 54 0^{\circ} + 54 0^{\circ} = 486 0^{\circ} + 648 0^{\circ} n + 54 0^{\circ}

Simplify

54 x = 540 0^{\circ} + 648 0^{\circ} n

54 x = 540 0^{\circ} + 648 0^{\circ} n

Divide both sides by

54

54 x = 540 0^{\circ} + 648 0^{\circ} n

Divide both sides by

54

\frac{54 x}{54} = 10 0^{\circ} + \frac{648 0 ^{\circ} n}{54}

Simplify

\frac{54 x}{54} = 10 0^{\circ} + \frac{648 0 ^{\circ} n}{54}

Simplify

\frac{54 x}{54} : x

\frac{54 x}{54}

Divide the numbers:

\frac{54}{54} = 1

= x

Simplify

10 0^{\circ} + \frac{648 0 ^{\circ} n}{54} : 10 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

10 0^{\circ} + \frac{648 0 ^{\circ} n}{54}

Cancel

10 0^{\circ} : 10 0^{\circ}

10 0^{\circ}

Cancel the common factor:

6

= 10 0^{\circ}

= 10 0^{\circ} + \frac{648 0 ^{\circ} n}{54}

Cancel

\frac{648 0 ^{\circ} n}{54} : \frac{36 0 ^{\circ} n}{3}

\frac{648 0 ^{\circ} n}{54}

Cancel the common factor:

18

= \frac{36 0 ^{\circ} n}{3}

= 10 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

x = 10 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

x = 10 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

x = 10 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

x = 4 0^{\circ} + \frac{36 0 ^{\circ} n}{3}, x = 10 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

Since the equation is undefined for:

10 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

x = 4 0^{\circ} + \frac{36 0 ^{\circ} n}{3}

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Frequently Asked Questions (FAQ)

What is the general solution for tan(2x+10)=cot(x-40) ?
The general solution for tan(2x+10)=cot(x-40) is x=40+(360n)/3