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Mathematics
OpenStudy (anonymous):

Which equation is represented by the intersection of the graphs below? A. sec x=-1 B. tan x=-1 C. sin x=-1 D. cos x=-1

OpenStudy (anonymous):

OpenStudy (accessdenied):

Do you know what the red graph in the picture is of?

OpenStudy (anonymous):

its either c or d

OpenStudy (anonymous):

no I don't

OpenStudy (accessdenied):

Well, I guess an easy way to test if it's C or D is to see if sin(0) or cos(0) is 0 (the red graph touches the point (0,0)

OpenStudy (accessdenied):

sin(0) = 0, and cos(0) = 1, which you could see by unit circle or calculator. So, sine sounds like the best candidate. :)

OpenStudy (anonymous):

thank you !

OpenStudy (accessdenied):

You're welcome! :)

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