A-4 and cos B -, where 0 < A, B <5, hnd the value2(A + B (i) cos (A+ B) iii) sin (A -B)in A-and sin B-,(A+ B)in co B1, where A and B both lie in second quadrant, find the valusin (A + B).(iv)cos (A -E124where-</i < π and 0 < B <-, find the following:(ii) cos (A + B)INCE1--25 and cos 8-5 , where π<A < 3π and on <B < 2n, find the followi(ii) cos (A + B)3, cos B=, where π < A <3π and 0 < B < π , find tan (A + B).1-1, cos B-12, where π < A < π and 3π < B < 2T, find tan (A-B).1-1 , cos B- ', where π <A < π and 0 B < π , find the following :A <--and2d12(ii)tan (A -B)te the following:78° cos 18 -cos 78° sin 18°36° cos 9° cos 36° sin 9°(ii) cos 47 cos 13 - sin 47 sin 13(iv) cos 80° cos 20+ sin 80° sin 20-12 and cot 2, where A lies in the second quadrant and B in tnt, find the values of the following:(A+B)(ii) cos (A+B)(iii) tan (A+B)1212tan A + tan B sin (A B)tan A tan B sin (A B)11°+ sin 11°11°- sin 11°s 8°-sin 80-tan 37。cos 9° + sin 9°cos 9a_ sin 9。= tan 56"= tan 54。