1. Graph y=-5cos(4x)

2. Find an equation for the function

3. Evaluate

Remember how I said that if you memorize the coordinates of the terminal points for the special angles, you can evaluate any trig function value for a special angle? That’s because all trig functions can be expressed in terms of sine and cosine:

EXTRA CREDIT: Prove any of these equations geometrically.

Define a function that has domain and range .

Look back at how we defined trig functions for ideas!

Find the following trigonometric function values

1.

2.

3.

Question Corner — Why is e^pii = -1?.

Something interesting to think about for those of you looking for vacation reading material.

”

There’s more than one path to knowledge; it’s not always the same knowledge once you get there, either. But if you think it was easy to get there, you’re not at the destination you think you’re at. |

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Comment from my mom (also a math teacher): “…the key to enjoying life (or math or whatever knowledge you are trying to gain) is to appreciate your time in the maze!”