<PRE><B>Question 1080058</B>
cos 0=1, so r=8
cos 45 is sqrt(2)/2, so r is 4 sqrt (2)
cos 90=0, so r is 0
cos 135 is - sqrt(2)/2, so r is -4 sqrt(2)
cos 180 is -1, so r=-8
cos 225 is -sqrt (2)/s, so r is -4 sqrt(2)
cos 270 is 0, so r is 0
cos 315 is sqrt(2)/2, so r is 4 sqrt (2)

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