Transcript Pre calculus Problem of the Day Homework: p. 472 1-27, 53

Pre calculus Problem of the Day
Homework: p. 472 1-17 odds, 25-31 odds, 39-59 odds
On the unit circle name all indicated angles by
their first positive name, both in degrees and
radians.
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http://www.libraryofmath.com/pages/measure-of-angles/Images/measure-of-angles
_gr_62.gif
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http://en.wikipedia.org/wiki/Unit_circle
Unit Circle has the equation
x 2  y2 1
We are going to define the 6 trigonometric functions in

terms of the unit circle, a point on the circle, P(x, y),
and a distance, t, that we move around the circle
starting at the point (1, 0)
Trigonometric Functions
For t equal to any real number and P(x, y) the terminal point
determined by t on the unit circle, the six trigonometric
functions are as follows:
sine
cosine
tangent
sin t = y
cos t = x
tan t = y/x
cosecant
secant
cotangent
csc t = 1/y
sec t = 1/x
cot t = x/y