For an acute angle

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

Problem

For an acute angle

x

, the value of

\dfrac{1+\tan^{2}x}{\sec x}

is given to be

10

. What is

\cos x

? (a)

\dfrac{1}{5}

(b)

\dfrac{1}{10}

(c)

\dfrac{3}{10}

(d)

\dfrac{1}{9}