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Trig
| Term | Definition |
|---|---|
| Coterminal angles | Angle with a multiple of 360° |
| Complementary angles | Add up to 90° |
| Supplementary angles | Add up to 180° |
| Acute angle | Less than 90° |
| right angle | An angle that equals 90° |
| obtuse angle | |
| An angle more than 90° | |
| Sin 0 | Y - R |
| cos 0 | X - R |
| Tan 0 | Y - X |
| Csc 0 | R - Y |
| Sec 0 | R - X |
| Cot 0 | X - Y |
| R | Radical X2 + y2 |
| Normal period for sin |