Trigonometry
Trignometrica
Bearings Pythagoras’ theorem Sine Cosine Tangent as multipliers Unit Circle & sin cos tan vs angle Sine and Cosine rules Triangles, Circles, Hero’s Formula Trigonometric identities Solving trigonometric equations Secant Cosecant Cotangent Inverse trigonometric functions Hyperbolic functions Trigonometric identities using complex numbers
Mach’s construction
Fourier Series & Fourier Transforms
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First created July 2012
Last updated May 2025