csc cot A = tan A 1 sec B = 1 sec cos A = 1/2 csc tan A = 1 sin A = 0 sec B = 1 tan tan A = 1 sin cos 1 cot A = tan A csc sin A = 0 cot A = 1 csc tan A sin sec B = 1 cos tan csc cos A = 1/2 cot A = 1 A = 1 sin A = 0 sec tan A = tan A csc