Question

HEY yar plz explain me the 31st sum

Answer 1

In the first step LCM IS taken. Below in the denominator the user has to write cos instead of cot. It's a writing mistake. After that using identity (a+b) square the values are expanded. In 4th step 2 is taken as common and the remaining is cancelled which gives the desired result.

Answer 2

Hi...☺

Here is your answer...☺

Hope it helps you... ☺

Thanks...