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Mathematics 9 Online
OpenStudy (anonymous):

the range of y=f(X)=ln(cosx) is a. -inf

OpenStudy (anonymous):

how did you figure that out?

OpenStudy (zarkon):

they are asking for the range not the domain.

OpenStudy (anonymous):

Ahh sorry english is not my native language :D

OpenStudy (anonymous):

The range is of course a.

OpenStudy (anonymous):

Because cos(x) takes values from -1 to 1. And ln projects the interval (0,1] onto (-INF, 0] which is answera.

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