Question

if 5 sin theta equals to 3 find the value of cos square theta

Answer 1

5 sin theta = 3

sin theta = 3/5

cos^2 = 1 - sin^2

cos^2 = 1 - (3/5)^2

cos^2 = 1 - 9/25

cos^2 = 25 - 9/25

cos^2 = 16/25

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Answer 2

5sinθ = 3

=> sinθ = 3/5

=>Cos²θ = 1 - Sin²θ

              = 1 - (3/5)²

              = 1 - 9/25

              = 25/25 - 9/25

              = 16/25