Trigonometry

Six units of right-triangle and unit-circle trigonometry. You name the sides of a right triangle, define sine, cosine and tangent as ratios, learn the exact values for 30°, 45° and 60°, solve triangles from one side and one angle, measure heights you cannot reach, switch to radians and the unit circle, and draw the sine wave. The trig lab has a resizable right triangle, a height-measuring range and a unit circle tied to its graph.

1. 1Sine, cosine and tangent
2. 2Exact values for 30°, 45° and 60°
3. 3Solving right triangles
4. 4Measuring heights with angles and shadows
5. 5Radians and the unit circle
6. 6Graphs of sine and cosine