Sine
Also: sin
A trigonometric ratio connecting an angle to the opposite side of a right triangle.
For angle θ, sin θ = opposite/hypotenuse and is also the y-coordinate on the unit circle.
- Formula
sin θ = opposite/hypotenuse
Example A 250 mm link at 30° rises 250 sin 30° = 125 mm.
Common misconception Sine uses the side opposite the named reference angle, not whichever side looks vertical.