math help please help me

label Calculus
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May 13th, 2015

Picture the unit circle! x=cos, y=sin .a.  sin<0 in quads 3 and 4. b. tan<0, cos>0 when sin<0,cos>0. That is quad 4. 

May 13th, 2015

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May 13th, 2015
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May 13th, 2015
Jun 27th, 2017
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