Broad objective of this article is to Discuss on Inverse Cosine and Inverse Sine. Here explain Inverse Cosine and Inverse Sine with proper examples. The typical trig functions are periodic, meaning that they replicate themselves. Therefore, the same output price appears for multiple input values in the function. This makes inverse functions impossible to construct. In order to fix equations involving trig characteristics, it is imperative with regard to inverse functions to occur. Thus, mathematicians have to restrict the trig function in order create these inverses.