Question 849421
 Find the terminal point P(x,y) on the unit circle 
determined by the value of t.
Note: On the unit circle P(x,y) is (cos(t),sin(t))
 
If t= pi/2, x = 0, y = 1
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If t=5pi/6, x = -sqrt(3)/2 ; y = 1/2
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Cheers,
Stan H.