Math, asked by Tanmay0312, 1 year ago

find the value of A if Cos A/ 1 - Sin A + Cos A / 1 + sin A = 4​

Answers

Answered by spiderman2019
2

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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