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OpenStudy (anonymous):
HELP ME PLZZ I DONT UNDERSTAND.... :( Which function has a domain of all real numbers except x= pi/2 +or- npi? A. y= cot x B. y= 1/sin x C. y= cos x D. y= sec x
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OpenStudy (anonymous):
cot = 1/cos(x), and sec = 1/cos(x) and you can't technically divide by 0 so...
OpenStudy (precal):
domain is all of the x values that is valid for the function, can't be cosx since its domain is all real numbers
OpenStudy (anonymous):
wait, cot = 1/tan(x)
OpenStudy (precal):
what is -npi?
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