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Trigonometry
Trigonometry
The unit circle, identities, trigonometric equations and their periodic graphs.
Problems
Extremes of a Linear Expression on an Ellipse
An Equation at Its Maximum
A Periodic Trigonometric Sum
An Alternating Sine Sum
Sum of Solutions of cos(π sin x) = −1/2
Powers of sin 18°
Sum of the Roots of a Sine Equation
A Sine Recursion That Settles
Powers from x + 1/x
A Telescoping Tangent Series