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Trigonometric Functions
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Demonstrations 21  40 of 147
Representations of Trigonometric and Hyperbolic Functions in Terms of Sector Areas
Designs for Ribbons and Friezes Based on Trigonometric Functions
Minimum Area between a Semicircle and a Rectangle
Cosine and Sine of the Sum of Two Angles
Derivatives of Trig and Hyperbolic Functions
Basis for Pure Geodetic Angles
A Special Case of the Sum of Two Cosines
Rational Harmonics
Rational Linear Combinations of Pure Geodetic Angles, Part 2
Rational Linear Combinations of Pure Geodetic Angles
Two Visual Proofs of a Basic Trigonometric Identity
Squares of Sine and Cosine
Orthogonality of Sines and Cosines
Proof of the Difference Formula for Sine and of the Addition Formula for Cosine
Dissection Proof of the Addition Formula for Sines
Plotting a Sine or Cosine Wave
Graphs of the Six Trigonometric Functions
Ratio of the Areas of a Circular Segment and a Curvilinear Triangle
Polar Graph of a Variable Trig Ratio
Spherical Trigonometry on a Gnomonic Projection
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