In this video, I will show you how to evaluate an angle in degrees using the sum formula of cosine. We will need to use the ...

A new Vanderbilt University study, funded by the U.S. Department of Education, finds that students learn best when taught the concepts behind math problems rather than specific procedures on how to ...

In this video I will show you how to evaluate the tangent of -75 degrees. We will do this by breaking up negative 75 degrees ...