Explore the mathematics of angles and triangles — from right triangle ratios to polar coordinates. Build intuition for periodic functions and identities.
Degrees, radians, and arc length
Sine, cosine, tangent in right triangles
Trig values on the unit circle
Amplitude, period, phase shift
Fundamental identities and simplification
Expanding and simplifying compound angles
Arcsine, arccosine, arctangent
Solving non-right triangles
An alternative coordinate system