“Why is sin(70°) the same as sin(110°)?

From Quora,

Here’s a diagram.

Each is 20°away from 90°. If you think in terms of the ratios of the sides of the triangles for the angles, SOHCAHTOA, then the opposite sides are the same and the hypotenuse is the same. So the ratio is the same for each.

sin_70_sin_110

Speak Your Mind

*