If and is acute

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

Problem

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

and

\theta

is acute, find

\cos\theta

. (a)

\dfrac{8}{13}

(b)

\dfrac{12}{13}

(c)

\dfrac{13}{12}

(d)

\dfrac{5}{13}