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OpenStudy (anonymous):
Pham: the domain of f(x)=tan x is all real numbers except odd multiple of 90 degree. Please explain what does it mean odd multiple of 90 degree?
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OpenStudy (amistre64):
1(90); 3(90); 5(90; and such odd multiples)
OpenStudy (amistre64):
at even multiples of 90 it = 0 sooo,,,,
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