DefinitionInverse trigonometric functions are inverse of sin, cos, tan etc.. functions. In otherwords, it is the angle θ, sin θ=x. These are useful to solve the trigonometric equations and in calculations of angles in the fields like physics, statistics. For example, the inverse of sin function called sin−1(x) or arcsin(x), x is called the angle value and if sin(θ)=0.5, then, Θ=arcsin(0.5)=6π