Asked by Anonymous
Evaluate for the quadrantal angle cos17(pie)? ( don't have the pie sign)
Is -1 correct?
Is -1 correct?
Answers
Answered by
Damon
17 pi = 16 pi + pi
but 16 pi is 8 times around from 0 to 2pi
so we really have
cos pi
which is indeed -1
but 16 pi is 8 times around from 0 to 2pi
so we really have
cos pi
which is indeed -1
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