SOLUTION: I need help using the unit circle. The question is find the exact value of sec 19pi/4

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Question 933006: I need help using the unit circle. The question is find the exact value of sec 19pi/4
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
May subtract multiples of 2pi for the desire value
4pi = 16pi/4 Re TY: 16pi%2F4++=+%2816%2F4%29pi+=+4pi
sec(19pi/4 - 16pi/4) = sec(3pi/4) = -2/√2 = -√2/2
............
(cosx, sinx) Summary Unit Circle
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