At this point we could simply assume that whenever we draw a triangle for computing sine and cosine, that the hypotenuse will be {{MATH_16}}. We can do this because we are simply scaling the triangle, and as we see above, this makes absolutely no difference when computing sine and cosine. Hence, when the hypotenuse is {{MATH_17}}, we find that a convenient way to think about sine and cosine is via the unit circle: {{CMD_18}} {{ENV_19}} {{CMD_20}}