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OpenStudy (anonymous):
What is the y-value of cos(x) when x = -360°? A. -1 B. 0 C. 1/2 D. 1
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OpenStudy (lgbasallote):
\[y = \cos x\] \[y = \cos (-360)\] use your calculator to solve...
OpenStudy (anonymous):
is it 1
hartnn (hartnn):
yup, its 1 :)
OpenStudy (anonymous):
thanx
OpenStudy (raden):
don't forget the property of trygonometri one of that : cos(-x) = cos(x)
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