Write the function in terms of the sine function by using the identity A cos ut B sin wt A2 B2 sinut arctan an 4 f t 7 cos nt 24 sinnt f t Use a graphing utility to graph both forms of the function y 6 5 4 3 2 20 What does the graph imply 10 20 WWW 6 5 4 3 2 2 3 4 6 5 4 3 2 30 20 10 nf t 20 10 WWW 30 f t