Posted by JOHN on Wednesday, January 4, 2012 at 10:05pm.
evaluate the trigonometric function of the given quadrantal angle.
Pre Calc - Reiny, Wednesday, January 4, 2012 at 10:34pm
subtract multiple of 360° (1400/360 = 3.8..
= tan320° , 320 is in IV and 40° from the x-axis
= cos π , (took away 4 multiples of 2π)
= cos π/2 (took away 6π)
= sin(-17π + 18π) , ( I added 9 rotations)
= sin π
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