Homework Help: geometry

Posted by yadlay on Tuesday, April 13, 2010 at 12:07am.

Draw the unit circle and a first-quadrant ray from the origin that makes an angle theta with the positive x-axis. Let B be the point on this ray whose x-coordinate is 1, and let
A = (1, 0). Segment AB is tangent to the circle. In terms of theta, find its length.

geometry - Reiny, Tuesday, April 13, 2010 at 12:49am
Isn't it just
tanŲ = AB/1
tanŲ = AB
Ų = arctan(AB) or tan^-1(AB)
geometry - Reiny, Tuesday, April 13, 2010 at 12:50am
The length AB = tanŲ

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