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