What is the general solution for 0.4=0.4cos^2(θ) ?

The general solution for 0.4=0.4cos^2(θ) is θ=2pin,θ=pi+2pin

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0.4=0.4cos^2(θ)

0.4 = 0.4 cos^{2} (θ)

θ = 2 πn, θ = π + 2 πn

Solution steps

0.4 = 0.4 cos^{2} (θ)

Switch sides

0.4 cos^{2} (θ) = 0.4

Solve by substitution

cos (θ) = 1, cos (θ) = - 1

cos (θ) = 1 : θ = 2 πn

cos (θ) = - 1 : θ = π + 2 πn

Combine all the solutions

θ = 2 πn, θ = π + 2 πn

sin (α) = \frac{15}{17}

4 sin^{2} (x) cot (x) - cot (x) = 0, 0 \leq x \leq 2 π

14 - sin (θ) = cos (2 θ)

csc (θ) = - \frac{5}{13}

cos (z) = 3

What is the general solution for 0.4=0.4cos^2(θ) ?
The general solution for 0.4=0.4cos^2(θ) is θ=2pin,θ=pi+2pin