2. a. If I writesin(sin1(x)) , then x is an ______________, which means sin1(x) is an ______________ and sin(sin1(x)) is an _____________. Fill in each blank with the word ratio or angle.

b. Explain why you know your answers are right.

3. Complete the following: Find the exact answer in radians. You should be able to do these fairly quickly and very accurately with a unit circle next to you, but make sure you can draw that unit circle for the exam!

a. sin1(12)= b. cos1(12)= c. tan1(1)=

d. Explain why you have two negative answers to the above problems and one positive answer even though all the ratios are negative.

Answers to 3:

a. sin1(12)=6 b. cos1(12)=23 c. tan1(1)=4