Prove the following trigonometric identities
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By rationalising
sinA/1-cosA*1+COSA/1+cosA
sinA*(1+COSA)/(1-COSA )(1+COSA)
SINA (1+cosA)/1-cos2a
sinA (1+cosa)/sin2a
CANCELLING SINA BY SIN2A
WE GET
1+cosA/sina=1/sina+cosa/sina
=cosecA+cotA
sinA/1-cosA*1+COSA/1+cosA
sinA*(1+COSA)/(1-COSA )(1+COSA)
SINA (1+cosA)/1-cos2a
sinA (1+cosa)/sin2a
CANCELLING SINA BY SIN2A
WE GET
1+cosA/sina=1/sina+cosa/sina
=cosecA+cotA
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