Let be an acute angle such that

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

Problem

Let

\theta

be an acute angle such that

\tan\theta = p\,(p>0)

. Which of the following expresses

\cos\theta

in terms of

p

? (a)

\dfrac{p}{\sqrt{1+p^{2}}}

(b)

\dfrac{1}{1+p^{2}}

(c)

\dfrac{1}{\sqrt{1+p^{2}}}

(d)

\dfrac{1}{p}