In the interval

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

Problem

In the interval [0,4π][0,4\pi], how many distinct points are either a maximum or a minimum of the functions y=sin⁡xy=\sin x or y=cos⁡xy=\cos x? (a) 88 (b) 1111 (c) 99 (d) 1010

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