Find sin(a), given that cos(a) = 2/5 and sin(a) < 0.

For a function to have an inverse, it must be ___________. To define the inverse sine function, we restrict the ____________ of the sine function to the interval ____________.

Use sin0=0, sin2=1, and sin=0 to estimate sin3.

Sketch the graph of y=2sinx from x=0 to x=2 by making a table using multiples of /2 for x. What is the amplitude of the graph you obtain?