I) express cos 30 in terms of cos 0.
32. il cos a = 2 (1 in quadranı iv) and sinb = (b in quadrant ii )find,

(i) sin(a - b)
(iii) cos(a+b)
23. find the exact value of by using the sum or difference formulas;

i) sin 105 degrees
(ii) cos 225°

None of those are technically correct. 9.7 x 104 is actually 1,008.8, but if that answer was a choice, it would be that one. if you meant 9.7 times maybe a thousand or more or divided by 10 or more, than the answer choices would be correct, but other than that, they actually arent.