What is the general solution for cos(θ)=-8/17 ?

The general solution for cos(θ)=-8/17 is θ=2.06075…+2pin,θ=-2.06075…+2pin

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cos(θ)=-8/17

cos (θ) = - \frac{8}{17}

θ = 2.06075 \dots + 2 πn, θ = - 2.06075 \dots + 2 πn

Solution steps

cos (θ) = - \frac{8}{17}

Apply trig inverse properties

θ = arccos (- \frac{8}{17}) + 2 πn, θ = - arccos (- \frac{8}{17}) + 2 πn

Show solutions in decimal form

θ = 2.06075 \dots + 2 πn, θ = - 2.06075 \dots + 2 πn

cos (2 x) = 8 - 15 sin (x)

sin (4 x) = cos (\frac{x}{2})

a, cos (a - b) = 2

cos (\frac{π}{2} - x) tan (x) - sec (- x) = 1

\frac{cot ( θ ) + csc ( θ )}{sec ( θ ) + 1} = sin (θ)

What is the general solution for cos(θ)=-8/17 ?
The general solution for cos(θ)=-8/17 is θ=2.06075…+2pin,θ=-2.06075…+2pin