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OpenStudy (anonymous):
Which graph represents a phase shift of pi/2 units right for the graph of y=cosx? A. Sin x B. Csc x C. Cos (x+ pi/2) D. Sec x
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OpenStudy (anonymous):
sin x= cos(x- pi/2) so, option A. sin x
OpenStudy (sweetburger):
Co-Function identities ftw
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