# Tangent of a Sum: Discovery

- Author:
- Tim Brzezinski

- Topic:
- Cosine, Right Triangles, Sine, Trigonometry

The applet below contains a rectangle with

**2 yellow similar triangles**.**The base of the rectangle has length 1.**There are 7 expressions shown off to the right.**Your job is to****carefully drag each expression (label) next to the segment (in the figure) whose length is given by this expression.**Don't bother labeling the dashed hypotenuse of the right triangle in the middle. Leave this dashed segment blank (without a label.) (If you're absolutely desperate, you can click the "show hint" button.)