Inverse Trigonometric Functions: Prove that tan⁻¹ [cos x/(1-sin x)] = (π/4 + x/2), x ∈ (-π/2, π/2)

Inverse Trigonometric Functions: Prove that : 2tan⁻¹ (1/x) = sinn⁻¹[2x/(x^2+1)]

Inverse Trigonometric Functions : Prove that tan⁻¹ 1 +cos⁻¹ (- 1/2) + sin⁻¹ (- 1/2) = 3π/4

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