What is general solution for equation cos4-cos2-Is - -n- also general solution for this equation-

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What is gener...

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What is general solution for equation cos4θ=cos2θ Is θ =nπ also general solution for this equation?

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cos 4 x = cos 2 x

cos 4 x = cos 2 x

cos 4 x = cos 2 x

α

s i n^{4} x + c o s^{4} x + s i n 2 x + α = 0

cos 4 x = \frac{\sqrt{5} + 1}{4}

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