Find the exact value of the expressions cos(a+B), sin(a + B) and tan(a+B) under the following conditions: sin(a)= 24 25 a lies in quadrant I, and sin()=- 12 . lies in quadrant II. 13 a. cos(a+)= 323 325 (Simplify your answer. Type an exact answer, using radicals as needed. Use integers or fractions for any numbers in the expression.) b. sin(x+8)= (Simplify your answer. Type an exact answer, using radicals as needed. Use integers or fractions for any numbers in the expression.)