Victory for the ACT Student Text 15e

V ICTORY P RACTICE T EST • 387

37. x x 2 ‹• ‡“—ƒŽ –‘ ™Š‹…Š ‘ˆ –Š‡ ˆ‘ŽŽ‘™‹‰ǫ Ǥ ͳ Ǥ sin x Ǥ cos x Ǥ sin x 1 Ǥ cos x 1 38. Š‡ ˜ƒŽ—‡ ‘ˆ .2 5 10 5 2 # ^ h ‹• ‡“—ƒŽ –‘ ™Š‹…Š ‘ˆ –Š‡ ˆ‘ŽŽ‘™‹‰ǫ Ǥ .2 5 10 7 # Ǥ 5 10 7 # The expression sin sin cos x

DO YOUR FIGURING HERE.

Ǥ .6 25 10 7 # Ǥ .2 5 10 10 # Ǥ .6 25 10 10 #

ˆ ( ) f x

ǡ ™Šƒ– ‹• –Š‡ ˜ƒŽ—‡ ‘ˆ ( ) f 2 ?

x x x 2 = − − −

39.

Ǥ 3 Ǥ 1 Ǥ 0 Ǥ 1 Ǥ 3 Ǥ 1 Ǥ 0 Ǥ 1 Ǥ 3 Ǥ ͹

ˆ ‘‡ ‘ˆ –Š‡ ”‘‘–• ‘ˆ –Š‡ ‡“—ƒ–‹‘ x kx 12 0 + − = 2

‹• Ͷǡ ™Šƒ– ‹• –Š‡ ˜ƒŽ—‡ ‘ˆ k ?

40.

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