Example: what are the sine, cosine and tangent of 30° ?
The classic 30° triangle has a hypotenuse of length 2, an opposite side of length 1 and an adjacent side of √3:
Sine
| sin(30°) = 1 / 2 = 0.5 | |
Cosine
| cos(30°) = 1.732 / 2 = 0.866... | |
Tangent
| tan(30°) = 1 / 1.732 = 0.577... |
Example: what are the sine, cosine and tangent of 45° ?
The classic 45° triangle has two sides of 1 and a hypotenuse of √2:
Sine
| sin(45°) = 1 / 1.414 = 0.707... | |
Cosine
| cos(45°) = 1 / 1.414 = 0.707... | |
Tangent
| tan(45°) = 1 / 1 = 1 |
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