CBSE Class 10 Answered
1+ cos A + sin A / 1 + cos A - sin A = 1 + sin A / cos A
LHS
1 + cos A + sin A / 1 + cos A - sin A
(1 + cos A + sin A ) ( 1+ cos A + sin A) ( 1 + cos2A + sin2A + 2 cos A + 2 cos A sin A + 2 sin A )
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( 1 + cos A )2 - (sinA )2 1 + cos2A + 2 cos A - sin2A
2+ 2 cos A + 2 cos A sin A + 2 sin A 2 ( 1 + cos A ) + 2 sin A ( 1 + cos A ) 1 + sin A
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2 cos2A + 2 cos A 2 cos A ( 1 + cos A ) cos A