### INTRODUCTORY EXERCISES - More Trig. Functions

**(1)** By plotting points, sketch the graphs of the following functions.

(a) y = 4sin*x*

(b) y = sin 4*x*

**(2)** Graph the following functions by plotting specific points.

(a) y = 2 + sin *x*

(b) y = -cos *x*

**(3)** Use the even-odd identities to simplify the expressions.

(a) cos(-2x)

(b) tan(-/4)

(c) sin(-4/3)