Math12.com has an excellent guide to Trigonometric Functions.

These are links to PDF files.

Part 1 (Angle Basics) Part 2 (The Unit Circle) Part 3 (Trig Ratios) Part 4 (Graphing Trig Functions I) Part 5 (Graphing Trig Functions II) Part 6 (Graphing Trig Functions III) Part 7 (Radian Graphs) Part 8 (Real Life Applications . . . → Read More: Guides to Trig Functions

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