Why would chocolate help you with the trig functions? If you know SOHCAHTOA, which you should learn if you are taking math, you know the ratios for three trig functions. There are three other …

## What is the sin of 90 degrees, Tutoring Precalculus

We looked at coordinates and their rays from the origin and the six trigonometric functions. To do that, we used SOHCAHTOA and to remember the other three functions, you can use the word 'chocolate' …

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## Tutoring Precalculus, Focusing on the Unit Circle and 30-60-90 and 45-45-90 Triangles

We started by focusing on the unit circle. There are two main triangles that form the basis for a lot of what they are doing in the class. 30-60-90 and 45-45-90. Knowing the ratios of the sides for …

## Tutoring Precalculus, Trigonometric Functions and Properties

We started by looking at a problem with triangles. Two smaller triangles made up a larger triangle. The larger triangle was a right triangle. Basically, we started finding different angles, and use …

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## Tutoring Precalculus, Why Inverse Trigonometric Functions have Restricted Domains

The first thing we saw was some points taken off for answers on a test because they were not in the right range. It would seem like there should be multiple answers for something like arccos(1/2), …

## Correcting a Problem with Bases and Exponents

Thanks for posting the photo of your work George, that makes it much easier to follow. Especially because the syntax in your typed version of the equations is not quote right. If you followed …

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