Deepak Scored 45->99%ile with Bounce Back Crack Course. You can do it too!

Find the principal value of each of the following :

Question:

Find the principal value of each of the following :

$\cot \left(\tan ^{-1} x+\cot ^{-1} x\right)$ 

Solution:

$\cot \left(\tan ^{-1} x+\cot ^{-1} x\right)=\cot \left(\frac{\pi}{2}\right)\left[\right.$ Formula: $\left.\tan ^{-1} x+\cot ^{-1} x=\frac{\pi}{2}\right]$

Putting value of $\cot \left(\frac{\pi}{2}\right)$

$=0$

 

Leave a comment

None
Free Study Material