Special Trig Values in Quadrant 1
*It is a good idea to know the values of the different trig functions in the first quadrant, where all the values are positive.
*Memorize the following list:
| Measurement | sin | cos | tan |
|---|---|---|---|
| 0 | 0 | 1 | 0 |
| 30 or π 6 | 1 2 | √3 2 | √3 3 |
| 45 or π 4 | √2 2 | √2 2 | 1 |
| 60 or π 3 | √3 2 | 1 2 | √3 |
| 90 or π 2 | 1 | 0 | Undefined |
