Which expression takes the same value as when and ?

The vertical position, , of a point at the tip of a windmill blade, in feet, is given by . Here is the angle of rotation.

1. How long is the windmill blade? Explain how you know.
2. What is the height of the windmill? Explain how you know.
3. Where is the point, , when ?

1. Explain how to use a unit circle to find a point, , with -coordinate .
2. Use a unit circle to estimate the value of .

1. What are some ways in which the tangent function is similar to the sine and cosine functions?
2. What are some ways in which the tangent function is different from the sine and cosine functions?

Match the trigonometric expressions with their graphs.