The value of is

MATHEMATICS · Single correct · CBSE · Mathematics · Limits and Derivatives · Limits and Derivatives

Problem

The value of

\lim_{x\to a}\frac{\cos x-\cos a}{\cot x-\cot a}

is (1)

-\sin^3a

(2)

\cos^3a

(3)

\sin^3a

(4)

\cot a