What is the general solution for cos(a)=-0.6 ?

The general solution for cos(a)=-0.6 is a=2.21429…+2pin,a=-2.21429…+2pin

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cos(a)=-0.6

cos (a) = - 0.6

a = 2.21429 \dots + 2 πn, a = - 2.21429 \dots + 2 πn

Degrees

a = 126.86989 \dots^{\circ} + 36 0^{\circ} n, a = - 126.86989 \dots^{\circ} + 36 0^{\circ} n

Solution steps

cos (a) = - 0.6

Apply trig inverse properties

cos (a) = - 0.6

General solutions for

cos (a) = - 0.6

cos (x) = - a \Rightarrow x = arccos (- a) + 2 πn, x = - arccos (- a) + 2 πn

a = arccos (- 0.6) + 2 πn, a = - arccos (- 0.6) + 2 πn

a = arccos (- 0.6) + 2 πn, a = - arccos (- 0.6) + 2 πn

Show solutions in decimal form

a = 2.21429 \dots + 2 πn, a = - 2.21429 \dots + 2 πn

15 arcsin (x) = 5 π

2 sin^{2} (x) - sin (x) = 0, 0 \leq x < 2 π

sin (x) = \frac{3}{7}

2 sin (θ) + 6 = - 3 + 6

sin (\frac{x}{2} - \frac{π}{3}) = \frac{1}{2}, 0 \leq x \leq 2 π

What is the general solution for cos(a)=-0.6 ?
The general solution for cos(a)=-0.6 is a=2.21429…+2pin,a=-2.21429…+2pin