If and , find…

MATHEMATICS · Single correct · CBSE · Mathematics · Trigonometric Functions · Trigonometric Functions

Problem

If

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

and

0 < x < \dfrac{\pi}{2}

, find

\cos 2x

. (a)

\dfrac{16}{25}

(b)

\dfrac{7}{25}

(c)

-\dfrac{7}{25}

(d)

\dfrac{1}{5}

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