Question

pls solve this as soon as possible....it's urgent​

Answer 1

Heya

_______________________________

L.H.S

( 1 - Cos x )²
_______
( Sin x )²

=>

( 1 - Cos x ) × ( 1 - Cos x )
__________________
( 1 - Cos x ) × ( 1 + Cos x )

=>

( 1 - Cos x )
________
( 1 + Cos x )

Hence proved

______________________________

Sin² x = 1 - Cos² x

And

( 1 - Cos x )². = ( 1 - Cos ) × ( 1 - Cos )