This past week we basically reviewed everything from the week before. One thing we reviewed was finding an inverse of an angle. Both sin-1 and arcsin mean the same thing. They are both used to find inverse. They are two ways to find inverses: by plugging it into your calculator or working it yourself by drawing a triangle picture. When finding an inverse by using your calculator it is important that you have your calculator set to degrees.

example:
1) sin-1 0.9
plug into your calculator sin-1 0.9 and your answer should be 64.2

On Friday we started 8-1. To solve for theta you have to get the trig function by itself then take the inverse. First you find where the angle is based on the trig function and whether it is positive or negative. By having to leave class early Friday I missed some of the examples on how to do these types of problems.