In this video I work through 129 examples of evaluating trigonometric expressions. We will evaluate the sine, cosine, and ...

I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those ...

Solve the equation \(4\sin x^\circ - 3 = 0\), where \(0 \le x \textless 360\). From the graph of the function, we can see that we should be expecting 2 solutions: 1 solution between \(0^\circ\) and ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American On Monday, the Onion reported that the ...

Here's another example to work through. This time you need to draw two right-angled triangles to help you with your working. If \(\sin p = \frac{3}{5}\) and \(\tan q ...