河南省商丘市第一高级中学2017-2018学年高一数学下学期期中试题 理答案（pdf）.pdf

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1、p20172018c1?p(n)Y!JK:?K?12?K,z?K5.123456789101112BCBCDCDAACDB?!WK:?K?4?K,z?K5.13.94214.12515.5016.12,54n!)K:)A?i,yL.17. (1)?n,=n = 2k(k Z),f(x) =cos2(2k+x)sin2(2kx)cos2(22k+1)x=cos2xsin2(x)cos2(x)=cos2x(sinx)2(cosx)2= sin2x.(2)?n,=n = 2k + 1(k Z),f(x) =cos2(2k+1)+xsin2(2k+1)xcos22(2k+1)+1x=cos22k+(+

2、x)sin22k+(x)cos22(2k+1)+(x)=cos2(+x)sin2(x)cos2(x)=(cosx)2sin2x(cosx)2= sin2x,.(4)n?f(x) = sin2x(?Ka?). . (5)(2)d(1)?f(2014) + f(5031007) = sin22014+ sin210062014.(7)= sin22014+ cos22014= 1.(10)18. (1)dsin + cos =3+12sincos =m2(3 + 1)2 8m 0, . (2) (sin + cos)2= 1 + 2sincos (3+12)2= 1 + m,.(4) m =32.

3、(6)(2)dsin + cos =3+12sin cos =34.(8)sin =32,cos =12sin =12,cos =32. . (10)q (0,2)? =6 =3.(12)19.(1)dL?.?,=y = Acos(t + ) + B?,.(1)A =2.40.62= 0.9,B =2.4+0.62= 1.5,.(3)dL6, =6. (4) y = 0.9cos(6x + ) + 1.5,qL:(3,2.4), 2.4 = 0.9cos(6 3 + ) + 1.5, = 2,.(5) y = 0.9sin(6t) + 1.5,t 0,24.(6)(2)-y 1.05?sin(

4、6t) 12. . (7) 2k 66t 2k +76,k Z,12k 1 t 12k + 75 t 18,.(9)5 t 711 t 18, . (11)US5:7:911:18:?m|,U(?8?S?. . (12)20. (1)? x (0,2), 2x +6 6,76, sin(2x +6) 12,1, . (2) a 0, f(x) b,3a + b, . (4)q 5 f(x) 1,b = 53a + b = 1,.(5)da = 2,b = 5.(6)(2) g(x) = 2 tanx, g(x)30,3)N4O=.(7) g(x)T =,x 6= k +2, T2=23, .

5、(9)q? =32,x =3,K?g.(10) 0 32(?K8mX),V).(12).p?(n)o?1121. (1)(0.004a0.0180.02220.028)101 a0.006; . (2). 0.5 0.04 0.06 0.22 = 0.18dx7010=0.180.28?x 76.43 ?76.43.(4).2350,60)?k500.006103()PA1,A2,A3;340,50)?k500.004102(),PB1,B2,.(5).l5?2,kU?(J?k10, . (7).A1,A2,A1,A3,A1,B1,A1,B2,A2,A3,A2,B1,A2,B2,A3,B1,A

6、3,B2,B1,B2.(9).q?2?340,50)?(Jk1,=B1,B2, . (10).?VP110.(12).22. (1) f(x),q0 , =2 f(x) = sin(x),.(2).qf(x)?, = 2,.(3). f(x) = sin2x.(4).(2)dKg(x) = 2sin(2x +3) + 1,.(6).dg(x) = 0,?2x +3= 2k 6,k Z2x +3= 2k +76,k Z,=x = k 4,k Zx = k +512,k Z. . (8).”?S?: x1= 4,x2=512,x3=34, K?:mlO323, . (10).eb a?,Ib a = 15 3+ 14 23=433.(11).b a?433p?(n)o?12