${\cot }^{-1}\left(21\right)+{\cot }^{-1}\left(13\right)+{\cot }^{-1}(-8)=$

Important Questions on Inverse Trigonometric Functions

EASY

COMEDK UGET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR MATHEMATICS>Chapter 17 - Inverse Trigonometric Functions>COMEDK UGET 2015>Q 1

$\tan \left({\cos }^{-1}\left(\frac{1}{5\sqrt{2}}\right)-{\sin }^{-1}\left(\frac{4}{\sqrt{17}}\right)\right)$ is

HARD

COMEDK UGET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR MATHEMATICS>Chapter 17 - Inverse Trigonometric Functions>COMEDK UGET 2014>Q 1

If ${\cot }^{-1}\frac{1}{5}+{\cot }^{-1}\frac{1}{3}-{\cot }^{-1}\frac{4}{7}={\cot }^{-1}x$, then $x$ is equal to