Use cosine, sine and tan to calculate angles and sides of right-angled triangles in a range of contexts.

The calculator app of Android smartphones is not limited to basic arithmetic operations. Here is a simple manipulation to turn the basic calculator into a scientific calculator (SIN, COS, TAN, LOG, ...

Math Notes understands the full set of trigonometry functions too, so you can use "sin," "cos," and "tan" in your expressions as well.