• The hypotenuse is taken to be the radius of a circle. If you scale the triangle so the hypotenuse = 1, then you're dealing with a unit circle and the sides of the triangle are sine & cosine function values.
  • Check out these articles for a simple free tool and tutorial that will make right angle trig simple enough for ANYBODY to understand!
  • Take the angle theta to begin rotation from the x axis. sin theta gives you the y coordinate of a point on the unit circle, cos theta gives you the x coordinate. tan theta is a little trickier to explain. Picture a tangent line perpendicular to the x axis (i.e. perpendicular to the point where theta = 0). Now draw a diagonal along the "line" to a point at a certain angle on the unit circle until it intersects with the earlier tangent line. The length of the tangent segment is the value of tan theta.

Copyright 2020, Wired Ivy, LLC

Answerbag | Terms of Service | Privacy Policy