If and lies in the first quadrant

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

Problem

If

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

and

\theta

lies in the first quadrant, what is

\cos\theta

? (a)

-\dfrac{12}{13}

(b)

\dfrac{8}{13}

(c)

\dfrac{12}{13}

(d)

\dfrac{5}{13}

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