In this video, I explain how to use Pythagorean identities to simplify trigonometric expressions. We focus on substituting 1-sin²θ with cos²θ to make the equation easier to work with, verifying the ...

Being able to identify which formula to use, sine or cosine, and when, is necessary to answer questions on this topic successfully. Check you are confident in how to use the sine and cosine rules.

In this video we are going to review the types of problems of trigonometry that you can expect to see on your precalculus ...

Have you ever tried searching Google for answers to your homework, and more specifically, math and science problems? Back in the day, this was a hard feat, as Google would only lead users to websites ...

Two New Orleans high school students recently attended a conference where they proved an “impossible” math problem by using trigonometry. For more than 2,000 years, mathematicians worldwide have ...