What is the general solution for cos(θ)=-0.71 ?

The general solution for cos(θ)=-0.71 is θ=2.36029…+2pin,θ=-2.36029…+2pin

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cos(θ)=-0.71

cos (θ) = - 0.71

θ = 2.36029 \dots + 2 πn, θ = - 2.36029 \dots + 2 πn

Solution steps

cos (θ) = - 0.71

Apply trig inverse properties

θ = arccos (- 0.71) + 2 πn, θ = - arccos (- 0.71) + 2 πn

Show solutions in decimal form

θ = 2.36029 \dots + 2 πn, θ = - 2.36029 \dots + 2 πn

cos (θ) = \frac{60}{61}

cos (\frac{1}{2} x) = 0

\frac{4 cos ( θ ) - 1}{tan ( θ )} = 2 sin (θ)

- 2 sin^{2} (x) - cos (x) = - 1, 0^{\circ} \leq x < 36 0^{\circ}

cos^{2} (θ) - 3 cos (θ) + 2 = sin^{2} (θ)

What is the general solution for cos(θ)=-0.71 ?
The general solution for cos(θ)=-0.71 is θ=2.36029…+2pin,θ=-2.36029…+2pin