Question

Find the principal solution of the following equation cos θ = 1/2​

Answer 1

Answer:

cos 60= 1/2

therefore theta=60 degree

Answer 2

θ = π/3 or 60°

Given that cos θ = 1/2

Then, θ = cos⁻¹ 1/2

= π/3

(Since , cos π/3 = 1/2 => cos⁻¹ 1/2 = π/3 )

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