What is the general solution for cos(θ)=-7/10 ?

The general solution for cos(θ)=-7/10 is θ=2.34619…+2pin,θ=-2.34619…+2pin

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cos(θ)=-7/10

cos (θ) = - \frac{7}{10}

θ = 2.34619 \dots + 2 πn, θ = - 2.34619 \dots + 2 πn

Solution steps

cos (θ) = - \frac{7}{10}

Apply trig inverse properties

θ = arccos (- \frac{7}{10}) + 2 πn, θ = - arccos (- \frac{7}{10}) + 2 πn

Show solutions in decimal form

θ = 2.34619 \dots + 2 πn, θ = - 2.34619 \dots + 2 πn

cot (b) = \frac{tan ( b ) cot ( b )}{csc ( b )}

h, f = tan (x) tan (h) x

cos (x) + 2 sin (x) + 3 = 0

x, arccos (x) = 1

cos (x) + 2 sin (x) = - 1

What is the general solution for cos(θ)=-7/10 ?
The general solution for cos(θ)=-7/10 is θ=2.34619…+2pin,θ=-2.34619…+2pin