If tan a = - 20 and cot B = 24 for a second-quadrant angle a and a third-quadrant angle , find the following. 21 7 (a) sin(a + B) -20/21 X (b) cos(a + B) -20/21 X (c) tan(a + B) -20/21 X (d) sin(a - B ) -20/21 X (e) cos(a - B) -20/21 X (f ) tan(a - B) -20/21 XIf a and B are acute angles such that cos a = UT + and tan B = 15 find the following. 8 (a) sin(a + B) (b) cos(a + B) (c) the quadrant containing a + B O Quadrant I O Quadrant II O Quadrant III O Quadrant IVUse the given conditions to find the exact value of the expression. cos a = %, sin 0: O, sin(a E) 13 3