Please help!!

Q1.

In the following problem, the expression is the right side of the formula for cos(a - [3) with particular values for a and . cos(65)cos(20) + sin(65)sin(2o) a. Identify a and B in each expression. The value for (x: |:| The value for [3: |:| Find the exact value of the expressions cos(a + p), sin(a + [5) and tan(o: + [3) under the following conditions: 40 24 sin(a) = E' 0: lies in quadrant I, and Sinai) = E, [3 lies in quadrant II. a. cos(o + B) = Cl (Simplify your answer. Type an exact answer, using radicals as needed. Use integers or fractions for any numbers in the expression.) Find the exact value of each of the following under the given conditions. 7 tan a: - a, (x lies in quadrant II, and cos [3 = 1' B lies in quadrant I a. sin (0: + B) b. cos (a + [3) c. tan (a + [3) a. sin(a+B)=D (Simplify your answer. Type an exact answer, using radicals as needed. Rationalize all denominators. Use integers or fractions for any numbers in the expression.) Find the exact value of each of the following under the given conditions. a. cos (a + B) b. sin (a + B) c. tan (a + B) 2 tan a = 7, It