prove that Cos A upon 1 - Sin A + Cos A upon 1 + sin a is equal to 2 second
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Step-by-step explanation:
cosA/(1-sinA)+cosA/(1+sinA)=2secA
LHS=cosA(1+sinA)+cos(1-sinA)/(1+sinA)1-sinA
=cosA{1-sinA+1+sinA)/1-sin^2
=cosA*2/cosA^2
=2/cosA
=2secA
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