Question

(a)To define the inverse sine function, we restrict the domain of sine to the interval  . On this interval the sine function is one-to-one, and its

inverse function is defined by .For example: because . 

(b)To define the inverse sine function, we restrict the domain of cosine to the interval  . On this interval the cosine function is one-to-one, and

its inverse function  is defined by   .For example: because    .