Find all values of for which the equation is valid

MATHEMATICS · Subjective · A Level · Mathematics · Trigonometry · Trigonometry

Problem

Find all values of α\alpha for which the equation sin⁡4x+cos⁡4x+sin⁡2x+α=0\sin^4x+\cos^4x+\sin2x+\alpha=0 is valid. Also find the general solution of the equation.

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