1.

SinA / 1+cosA = cosecA - cosA​

Answer»

ANSWER:

sinA/1-cosA = COSECA + COTA

LHS

sinA/1-cosA

= sinA(1+cosA)/(1-cosA)(1+cosA)

= sinA(1+cosA)/(1-cos2A)

= sinA(1+cosA)/sin2A

= 1+cosA/sinA

= 1/sinA + cosA/sinA

= cosecA + cotA

= RHS

Hence, PROVED!



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