find the value of A if Cos A/ 1 - Sin A + Cos A / 1 + sin A = 4
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Answer:
60°
Step-by-step explanation:
CosA/1 - SinA + CosA/1 + SinA = 4
=> Cos(1 + SinA) + CosA(1 - SinA) / (1 - SinA)(1+SinA) = 4
=> CosA + CosASinA + CosA - CosASinA/ Cos²A = 4
=> 2CosA/Cos²A = 4
=> 2SecA = 4
=> SecA = 2
=> A = 60° (∵Cos60 ° = 1/2)
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