Question

If 5 Sin A + Cos square A = 2 and A is an acute angle, find the value of SinA​

Answer 1

Answer:

5sinA + cos²A = 2

or, 5sinA = 2 - cos²A

or, 5sinA = 1 + 1 - cos²A

or, 5sinA = 1 + sin²A

or, 5 = 1 + sin²A/sinA

or, 1/sinA + sin²A/sinA = 5

or, cosecA + sinA = 5

or, sinA = 5 - cosecA

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