Question

Anyone has answer of this question?
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Answer 1

Heya

_______________________________

Replace 2 - Sin² x = 2 - ( 1 - Cos² x )

= 1 + Cos² x

And

Replace Tan² x by Sin² x / Cos² x

=>

L.H.S

1/( 1 + Cos² x ) + Cos² x / (1 + Cos² x )

=>

{ 1 + Cos² x }
_________
{ 1 + Cos² x }

= 1

L.H.S = R.H.S

Hence, proved