Given with , find the value of…

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

Problem

Given

\sin x=\dfrac{3}{5}

with

0^{\circ}<x<90^{\circ}

, find the value of

\cos 2x

. (a)

-\dfrac{7}{25}

(b)

\dfrac{16}{25}

(c)

\dfrac{7}{25}

(d)

\dfrac{24}{25}

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