What is the general solution for cos(θ)= 7/9 ?

The general solution for cos(θ)= 7/9 is θ=0.67967…+2pin,θ=2pi-0.67967…+2pin

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cos(θ)= 7/9

cos (θ) = \frac{7}{9}

θ = 0.67967 \dots + 2 πn, θ = 2 π - 0.67967 \dots + 2 πn

Solution steps

cos (θ) = \frac{7}{9}

Apply trig inverse properties

θ = arccos (\frac{7}{9}) + 2 πn, θ = 2 π - arccos (\frac{7}{9}) + 2 πn

Show solutions in decimal form

θ = 0.67967 \dots + 2 πn, θ = 2 π - 0.67967 \dots + 2 πn

1 - cot^{2} (x) = 0

cot^{2} (x) - 2 csc^{2} (x) + 5 = 0

3 tan (x) = 3, 0 \leq x < 2 π

cos (x) = \frac{5.3}{8.5}

sin (3 x) = cos (x)

What is the general solution for cos(θ)= 7/9 ?
The general solution for cos(θ)= 7/9 is θ=0.67967…+2pin,θ=2pi-0.67967…+2pin