. Sine Function and Inverse Sine Function Let us recall that sine function is a function with as its domain and [ , ] - as its range. We write y = sin and y sin or y = arcsin( ) to represent the sine function and the inverse sine function, respectively. Here, the symbol - is not an exponent.
It denotes the inverse and does not mean the reciprocal. We know that sin ) = π is true for all real numbers x . Also, sin x ) need not be equal to sin x for < < π and for all x . Hence, the period of the sine function is p .