1.

11+= 2secA1+ sinA 1 - sin A​

Answer»

ANSWER:

L.H.S.

1+sinAcosA+cosA1+sinA

=cosA(1+sinA)COS2A+(1+sinA)2

=cosA(1+sinA)cos2A+1+sin2A+2sinA

=cosA(1+sinA)2+2sinA

=cosA2=2secA = R.H.S.



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