Graph each of the following trig functions. 9-82 HW eTool.

1. $y = 2$sin$(x)$ and $y =$ cos$(x)$ on the same set of axes.

   Hint (a):

   Review the Math Notes box in Lesson 7.2.4.

2. Use your answer to part (a) to graph $y = 2$sin$(x) +$ cos$(x)$.

   Hint (b):

   Try adding and then graphing the $y$-values of each function for each $\frac{\pi}{2}$ multiple of $x$.

   Use the eTool below to help you with this problem.
   Click on the link at right for the full eTool version: CCA2 9-82 HW eTool.