Question

In java, I’m trying to operate on numbers with cos and sin, yet I keep getting negative variables, can anybody explain why?

This is my code:

double velocity_x=22*Math.sin(10);

double velocity_y=22*Math.cos(10);

They both respectively return velocity_x=-11.968464439566135

and velocity_y=-18.459573639681953

What am I doing wrong?

Answer 1

The argument to sin() and cos() is in radians, not degrees. To convert, multiply by π/180:

double velocity_x = 22 * Math.sin(10 * Math.PI / 180);