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Mathematics 12 Online
OpenStudy (anonymous):

cos 0 = - 10 / 13 , tan 0 < 0 whats the sin 0?

OpenStudy (tkhunny):

Have you considered drawing a Right Triangle? Designate an acute angle "\(\theta\)". Adjacent side is 10 Hypotenuse is 13 Opposite side is What? Okay, now what quadrant are we in?

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