Question
Sun July 22, 2012 By:
 

sin theta / 1+cos theta + sin theta / 1-cos theta equals what?

Expert Reply
Sun July 22, 2012
sin A/ 1+cosA + sin A/ 1-cosA
= sinA(1-cosA) + sinA(1+ cosA)/1-cos2A
= 2 sinA/sin2A
= 2 cosec A
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