(Sina/1-cosa-1-cosa/sina)(cosa/1-sina-1-sina/cosa)
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Answer:
Step-by-step explanation:
LHS = sin A÷(1+ cos A) { Multiply sin A & (1+ cos A) by (1 - cos A)
•°• it becomes = [sin A (1 - cos A)] ÷ [(1 + cos A)(1 - cos A)]
= [sin A (1 - cos A)] ÷ [ 1 - cos^2 A]
= [sin A (1 - cos A)] ÷ [sin^2 A] {sin A is cut above and below}
= (1 - cos A) ÷ sin A
= RHS
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