choose One Of The Following Trigonometry Statements And Discuss Its Veracity

choose One Of The Following Trigonometry Statements And Discuss Its Veracity

An equation that has an infinite number of solutions is an identity.

sin-1x = cscx-1.

sin (x+y) = sin⁡ x + sin ⁡y.

If 0° ≤ θ ≤ 90°, then cosθ = sin (180° – θ).

cos (cos-1x) = x.

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