Make: Geometry

We can also equivalently think of this as going around the axis -A°. Negative

angles move things around clockwise.

sin(0° - A) = sin(A)

cos(0° - A) = -cos(A)

tan(0° - A) = -tan(A)

Finally, if we kept going, and went around 360°, we would come right back to

where we started. Adding 360° to any angle gives you all the same values for

sine, cosine, tangent, and all the other ratios. This means that it is very handy

to use these functions for things that are going around in circles, or that

repeat somehow.

Now that we know how sine, cosine, and tangent work for angles more

than 90 degrees, we can graph them for any angle. You can get values for

thes ...