12. The Circle
The definition of π. The remarkable π/4.
Degree measure. Standard position.
14. Radian Measure
Radians into degrees. Degrees into radians. Coterminal angles. The multiples of π.
15. Arc Length
The definition of radian measure. s = rθ.
The area of a triangle.
Similar figures. All functions from one function. Complements. Cofunctions.
12. The Law of Sines
The method of rearranging.
14. Evaluating π
The ratio of a chord to the diameter.
The analytic definition of the trigonometric functions.
The corresponding acute angle.
17. Line Values
The zeros of sin θ. The period of a function.
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