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Math Notes, Trigonometry Basics

This page provides

Trig I -- Sine, Conventional Definition Via Circles and Triangles with Graphs
Trig II -- Cosine, Conventional Definition Via Circles and Triangles with Graphs
Trig III -- Tangent, Conventional Definition Via Circles and Triangles with Graphs
Trig IV -- Cotangent, Conventional Definition Via Circles and Triangles with Graphs
Trig V -- Secant, Conventional Definition Via Circles and Triangles with Graphs
Trig VI -- Cosecant, Conventional Definition Via Circles and Triangles with Graphs
Trig VII -- Relationship to Exponentials

See also Trig Identities