Suppose that A and B are angles in standard position. Use the given information to find (a) sin (A + B), (b) sin (A - B), (c) tan (A + B), (d) tan (A - B), (e) the quadrant of A+ B, and (f) the quadrant of A - B. cos A = - 12 13 and cos B = - 8 π 17' 2

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