(120 ( 30 4 120 31- A=(-10,12} B AnB=(-I 0)AUB=(-2 1012,3} B=() {10,3} B.(-2,13 C.(—2,10,3) D(—2,0,3} 32- d=(3 2)6=(—2, 6， ()· A·-2 B.3 a 3 D.2 33.“<4” A.<6 B. C:x0 34· :log39一 ()· A.1 B.; C直 2 35. A1 B·4 C.3 2 36。C: 2;+2=0 A.2/2 B.2/3 C.12 37- 15—2:P6 A.(-00,-2)U日，+> 111 B.(-Y C.(-,y)U(,+) D.(+) 38。 sin 75cos 15+cos 105sin 165 = 73 C.-1 D.I 39·AABC A(01)B(1,6)C(50) BC (). A./10 B.5 C.4 D.3 40-/+4^=24 A.73 B.75 C.2/30 D.6/2 41. /(0: v2x--I A.g(x)=:In(2x-)B.g )12x-1 C.g(x)=V2x- D.g-(x)=e21 42.{}a0t2aH=ai=l=() A.-32 B.64 a64 a-32 43.P (10) +/=1 f Q Q A. -f) B.A a 4) 44·（2,3) 3y-1=0 A-3y+13=0 B.2:+3^5=0 C*X+2y=0 D.3a:-2y+12: 7 45, a sina=l cosa=（> 2/10 A. D. 46- =uξcwoy /(a)=-1 A.-2 23 B.3 C.23 P.2 3 47- /Cr)=3sin(2x- A· /U) 2u B. /Cr) 1 C. /U) g c)=3sin 2a: f D. /U) f 48. 49·AABC ZA ZB Z C a 6c, =3=/1 =60° 6 A.3 B.4 C.5 D.6 50- ASCI∥ AAJ/BBJCC^AA ABC AB BC 5=2,50=3n=4 (r A.4 B.10 C.12 D.24 0.0125....... 0.0075........ 0.0050.… 0.0025-"i- 八- 30507090110130150/ 53 51- U,} S =27,53=108 A=( A.4 B.5 C,6 D.7 52. AABC D BC =4 @ A.-4AB+3AC B.-3AB+4AC C.-2AB4*3AC U-j AB+j AC 53. 500 (:) (30,150 (90,130] A.350 B.300 C.275 D.150 8
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