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

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

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cos(θ)=-0.6

cos (θ) = - 0.6

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

Solution steps

cos (θ) = - 0.6

Apply trig inverse properties

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

Show solutions in decimal form

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

3 cos (3 x) - 15 sin (3 x) = 0

2 tan (x) - 3 cot (x) = 0

8 sin (2 x) + 15 cos (x) = 0

cos (\frac{x}{2}) - 2 cos (x) - 2 = 0

8 \cdot cos^{2} (3 x) + 6 \cdot cos (6 x) = 10216

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