The equation is considered in the interval

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

Problem

The equation sin⁡4x=22\sin 4x = \dfrac{\sqrt{2}}{2} is considered in the interval [0,2π)[0,2\pi). How many solutions does it have in this interval? (a) 66 (b) 1010 (c) 88 (d) 44

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