If and is acute

MATHEMATICS · Single correct · CBSE · Mathematics · Introduction to Trigonometry · Introduction to Trigonometry

Problem

If

\sin \theta = \dfrac{5}{13}

and

\theta

is acute, find the value of

\cos \theta

. (a)

\dfrac{144}{169}

(b)

\dfrac{5}{12}

(c)

\dfrac{12}{13}

(d)

\sqrt{\dfrac{8}{13}}

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