Question

the range of sin and cos

Answer 1

The sine and cosine functions have a period of 2π radians and the tangent function has a period of π radians. Domain and range: From the graphs above we see that for both the sine and cosine functions the domain is all real numbers and the range is all reals from −1 to +1 inclusive. ... To use them x must be in radians

Answer 2

range of sin is [-1,1]
range of cos is [-1,1]