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Trigonometric Functions
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Demonstrations 41  60 of 160
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
Sine Oval and Nested Trig Functions
Difference Formula for Cosine
Orthonormality of Standing Waves
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