Asked by Anonymous
Evaluate exactly cos(-(45pi/4))
Answers
Answered by
Damon
11.25 * pi
that is 2 pi*5 + 1.25 pi
or five circles plus pi plus pi/4 CLOCKWISE
quadrant 2
cos is negative in quadrant two
so negative (1/2)sqrt 2
that is 2 pi*5 + 1.25 pi
or five circles plus pi plus pi/4 CLOCKWISE
quadrant 2
cos is negative in quadrant two
so negative (1/2)sqrt 2
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