.bro...explain.....
.....
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Answer:
RHS
sin²A/(1-CosA). [sin²=1-Cos²A]
(1-Cos²A)/(1-CosA). [a²-b²=(a+b)(a-b]
[(1+CosA)(1-CosA)]/(1-CosA)
1+CosA. [CosA=1/SecA]
1+1/SecA
(SecA+1)/SecA
Proved
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very simple question...
see figure in attachment
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