Reference Angles
The concept of reference angles will be used to find equivalent ratios for sine, cosine, and tangent in different quadrants.
The Unit Circle
The exact value of the trigonometric ratios for 0°, 30°, 45°, 60°, and 90° will be discovered by analyzing the unit circle using special triangles.
30-60-90 Triangles
The ratios of the 30-60-90 triangle will be derived using the Pythagorean Theorem. The ratios when the be applied to quickly find the side lengths of any 30-60-90 triangle.