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An equation that has an infinite number of solutions is an identity. sin-1x = cscx-1.…

An equation that has an infinite number of solutions is an identity. sin-1x = cscx-1.…

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.