Solve the following trigonometric equations:n (cos2 θ-sin2 θ) = 1. – InterviewSolution

1.

Solve the following trigonometric equations:n (cos2 θ-sin2 θ) = 1.

Answer»

2(cos²∅-sin²∅) = 1

=> 2cos2∅ = 1..... ( since cos²∅-sin²∅ = cos2∅)

=> cos2∅ = 1/2

so. 2∅ = 2nπ + π/3

=> ∅ = nπ + π/6

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