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Mathematics 8 Online
OpenStudy (df001):

If θ = Arc tan(-1), find angle θ I am confused whether to leave the negative sign out for (-1) when tan(-1) is being inversed. Does θ equal to -45 degrees or 45 degrees??

OpenStudy (df001):

I got two answers from two different helpers and I am confused!!

OpenStudy (df001):

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