The general solution of is:

MATHEMATICS · Single correct · A Level · Mathematics · Trigonometry · Trigonometry

Problem

The general solution of 4sin⁡4x+cos⁡4x=14\sin^4x+\cos^4x=1 is: (1) (2n+1)π2(2n+1)\frac{\pi}{2} (2) nπn\pi (3) nπ±sin⁡−125n\pi\pm\sin^{-1}\sqrt{\frac{2}{5}} (4) None of these

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