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 of Trig Functions)

- Part 9 (Other Trig Graphs)

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