222學年浙省寧波市曙區(qū)九年（上）期數(shù)學試卷222一選題每題4分，共48分）2A41B11DABCD4ABCBACA50CBA30

B

C20

DABCDcm48ABCACBA

B

C

DPPCO

ACPA40

B

C30

D+3A2+1Byx+2+1+1Dyx+4

4ODABOCPA40

B

C80

DBCDEADA

B

C

DOBCacosBACbBACA0

B1

C2

D34Sr

A

BC

D{}amin{b}ba{}{14}min{62}6{2}A2

2B

+11

D2二填題每題4分，共24分）474b425c

C4CrCBCr464AAOPQAO2AP4AB6BCC三解題第19題分第20、題題8分第、、24題題10分，題12分26題分共78分）612

cos45

8ABCDDC128CEDFABDABEDF21O2CE

120DF600AC301400EBC45DF10OACODF1EF2ABEF

DCB10

1ABCABC

ABC25ABC1240RPRPxR500+3017021x

xy21500314+1CABC123DBDC4AFOF

2017-2018學年江寧市曙九級上期數(shù)試參考答案試題解析一選題每題4分，共48分）2A41B11D1

1DABCDCB1CD、A4ABCBACA50CBA30

B

C20

DCAC50ACBABAC

AB

CDcmll

B48ABCACBA

B

C

Dtan

BPPCO

ACPA40

B

C30

D

12060PCOCPCO90

120OAOC

2）2）2222PCC+3AyxByx+2Cyx+4D+4yx+1+3+32y2+1A4ODABOCPA40

B

C80

DODOBDCBBPDODABCDDCB180BOD2DCBBPD80BPD90D

BCDEADA

B

C

DAEABeq\o\ac(△,Rt)ADE2DAEABCDCDBEAFDC2DEeq\o\ac(△,Rt)ADEAE2DEsinBOBCacosBACbBAC

A0

B1

C2

D3BDBDBCDBDCBCaCD1sinBDCacosbsinBACbtan4SrA

BC

DOBOAr

2222222222APOBPOAP2222222222

OA

r

rrOOPOAOBr30

OA

rOAPOBP90AOB180120

四邊形

扇形

AOB2r

r

rr0{}amin{b}ba{}{14}min{62}6{2}A2

2B

+11

D2in{2x}+22x1

xx

min{+22}xx1

2x

x+2xx1x12+2

xx

{x}xx1

x+2{x+22x}2

2A二填題每題4分，共24分）

2222472222

4b425c10c4c10c10cmC4CrCBCrr4AC5r3rABC90ACr3rr4ddRdR462ODCFBDBEABCDEFBCOFODBCOFODOFODCFCDCFROABAC+BC10

AFBD+CFAB6+810424AAOPQAO2APABPAQCPQABPACABPACQABPAB20

4AB6BCCPDEPDCEDCEDABEeq\o\ac(△,Rt)ADPeq\o\ac(△,Rt)EABAPPDECDDECDCDPAEBAEBCDABEeq\o\ac(△,Rt)ADBEAeq\o\ac(△,Rt)ADPeq\o\ac(△,Rt)EAB

5

三解題第19題分第20、題題8分第、、24題題10分，題12分26題分共78分）612

cos452y31

12y38ABCDDC1221D2

8CEDFABDABEDF21O2CE

120OHeq\o\ac(△,Rt)2OMECeq\o\ac(△,Rt)OMC1HOB

120AOBOBOH12060AHeq\o\ac(△,Rt)BOHsinBOH

OB222OMECeq\o\ac(△,Rt)BOHOHEHOMME1eq\o\ac(△,Rt)OMC

ME1+CE

DF600AC301400EBC45DFDFNCNxeq\o\ac(△,Rt)BCExeq\o\ac(△,Rt)

x+700+DFAB600NACeq\o\ac(△,Rt)BCEtan45CN

eq\o\ac(△,Rt)tan

tan30CMCN+MN700

x700

+700+1300DF700

+1300．

10OACODF1EF2ABEF

DCBFABEFDOD

2EOCxCAx13x18ECF1EFODACEDOD

90EDOEFODO2eq\o\ac(△,Rt)sinEODOA510x18

EF10

1ABCABCABC25ABCBC21BC

AB21ABCABC1352

1240RPRPxR500+301702

2222212221x2x+170xx215002222212223xy2y31x17022xxyx+170500+30xx5002xx2yx+140x2050x40x203y2xxx+1950a2x35y14+1CABC123DBDC4AFOFyxxABC

122[2222212122[22222122BPeq\o\ac(△,Rt)BOC3D1yBDC值1y2BDC4CO45CECOFCOOFCeq\o\ac(△,)FOF1+10x1xB0x033Cx130x121eq\o\ac(△,