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Mathematics 12 Online
OpenStudy (anonymous):

Which of the following are identities? Check all that apply. A) tan(x-pi/4)=tanx-1 B) 1-tanxtany=sin(x+y)/sinxsiny C) tanx-tany=sin(x-y)/cosxcoy D) cos(x+pi/6)= -sin(x-pi/3)

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