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Popular >

4*cos(30)

Solution

4 \cdot cos (3 0^{\circ})

Solution

23

+1

Decimal Notation

3.46410 \dots

Solution steps

4 cos (3 0^{\circ})

Use the following trivial identity:

cos (3 0^{\circ}) = \frac{3}{2}

cos (3 0^{\circ})

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{3}{2}

= 4 \cdot \frac{3}{2}

Simplify

4 \cdot \frac{3}{2} : 23

4 \cdot \frac{3}{2}

Multiply fractions:

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

= \frac{3 \cdot 4}{2}

Divide the numbers:

\frac{4}{2} = 2

= 23

= 23

Popular Examples

(tan(10)+tan(50))/(1-tan(10)tan(50))

\frac{tan ( 1 0 ^{\circ} ) + tan ( 5 0 ^{\circ} )}{1 - tan ( 1 0 ^{\circ} ) tan ( 5 0 ^{\circ} )}

sinh (2 π)

cos^2(22.5)-sin^2(22.5)

cos^{2} (22. 5^{\circ}) - sin^{2} (22. 5^{\circ})

cos(45)cos(30)+sin(45)sin(30)

cos (4 5^{\circ}) cos (3 0^{\circ}) + sin (4 5^{\circ}) sin (3 0^{\circ})

sin((5pi)/(12))-sin(pi/(12))

sin (\frac{5 π}{12}) - sin (\frac{π}{12})

Frequently Asked Questions (FAQ)

What is the value of 4*cos(30) ?
The value of 4*cos(30) is 2sqrt(3)