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Mathematics 8 Online
OpenStudy (anonymous):

Name one x value where the graph of y = cos x crosses the x axis. A. 0 B. 90 C. 180 D. 45

OpenStudy (anonymous):

cos 0=1...that crosses the x axis

OpenStudy (anonymous):

so its A

OpenStudy (anonymous):

hold on a sec....cos 45=0.7071...that also crosses the x axis

OpenStudy (anonymous):

cos 180 is -1 while cos 90 is 0

OpenStudy (anonymous):

am thinking 90...not so sure what exactly d question is asking for

OpenStudy (anonymous):

what would you pick

OpenStudy (anonymous):

B.90 @Tblack

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