Question

plz plz plz slv this sum .........​

Answer 1

REFER THE ATTACHMENT

HOPE IT HELPS U !!!

Answer 2

AmswEr:-

(See The Attachments For The correct proof).

$\rule{200}2$

Some important trigonometric IDs:-

$\tt\longrightarrow \sin {}^{2} \theta + \cos {}^{2} \theta = 1. \\ \\ \tt\longrightarrow1 + \tan {}^{2} \theta = \sec {}^{2} \theta. \\ \\ \tt\longrightarrow1 + \cot {}^{2} \theta = cosec {}^{2} \theta.$