1、 1 31 2016-2017 12 4 48 1 A 1 B 0 C 0 1 D 1 2 A B C D 3 Rt ABC C=90 AC=3 BC=4 sinB A B C D 4 A B C D 30 5 y= x 2 2x+3 A B C D 6 A 99% B “ ” C 10 3 D A 100 A 7 2 31 7 “ ” A B C D 8 AB O CD AB E CD=16 EB=4 AE= A 20 B 18 C 16 D 14 9 ABC O AO=3 AC=4 tanB= A B C D 10 AD ABC E AD AE ED=1 3 BE AC F AF FC=
2、A 1 3 B 1 4 C 1 5 D 1 6 11 a b c b a c a b c A B C D 12 A B C O AB O BC O AC O n n 3 31 A 12 B 15 C 18 D 20 4 24 13 t a n = = 14 n 1 5 50 200 500 1000 3000 m 0 4 45 188 476 951 2850 0 0.8 0.9 0.94 0.952 0.951 0.95 15 A 3 y 1 B 0 y 2 y= 2 x 1 2 +3 y 1 y 2 y 1 y 2 y 1 =y 2 y 1 y 2 16 D E AB AC DE BC A
3、D=3 BD=9 DE=2 BC= 17 ABO O A 2 2 B 4 2 C x O B C ABO C 4 31 18 P 1 2 P O y A B P BAO=45 B 8 78 19 3 2 2 1 2 20 y=x 2 2x 2 3 1 2 n n 21 AB C 60 D 30 CD=12 AB 5 31 22 ABC D E AB AC AE=4 AB=6 AD AC=2 3 ABC AF DE G BC F 1 2 AG GF 23 AB O D CD BA E BD AC F 1 DC 2 =D F D B 2 AE=AO CD=2 ED 24 80m 20m AD xm
4、 ABCD ym 2 1 GH x 2 y x x 2 x y 6 31 25 1 D E ABC BC ADE ABC ADE ABC 1 “ ” “ ” “ ” 2 2 ABC BAC=120 ADE ABC AB 2 =BD B C 3 2 AB=1 AC=2 ABC ADE 26 1 y= x 2 +bx+c x A 4 0 B 1 0 y C 1 2 E E EF x F AC H EH=FH E 3 2 CE x E E ER x R G OR ES CG S ESR OG B 1 B CG EB 1 OG 7 31 8 31 2016-2017 12 4 48 1 A 1 B 0
5、 C 0 1 D 1 1 1 A 2 A B C D D 3 Rt ABC C=90 AC=3 BC=4 sinB A B C D AB 9 31 Rt ABC AC=3 BC=4 AB=5 sinB= = B 4 A B C D 30 A B C D 30 30 120 30 75 75 D 5 y= x 2 2x+3 A B C D y= x 2 2x+3= x+1 2 +4 a= 1 0 1 4 10 31 A A 6 A 99% B “ ” C 10 3 D A 100 A 7 99% A “ ” B 10 3 C A 100 A 7 11 31 D D 7 “ ” A B C D “
6、 ” C 8 AB O CD AB E CD=16 EB=4 AE= A 20 B 18 C 16 D 14 OC O R CE=8 R 2 = R 4 2 +8 2 R=10 AE=2R 4 OC O R AB CD CE=DE= CD= 16=8 Rt OCE OC=R OE=R 4 OC 2 =OE 2 +CE 2 R 2 = R 4 2 +8 2 R=10 AE=AB EB=2 10 4=16 12 31 C 9 ABC O AO=3 AC=4 tanB= A B C D AO O D CD B= D ACD=90 CD AO O D CD B= D ACD=90 AC=4 AO=3=
7、OD CD= = =2 tanB=tanD= = = D 10 AD ABC E AD AE ED=1 3 BE AC F AF FC= 13 31 A 1 3 B 1 4 C 1 5 D 1 6 DH BF AC H FH=HC = = DH BF AC H AD ABC FH=HC DH BF = = AF FC=1 6 D 11 a b c b a c a b c A B C D b b= 14 31 a=2 c=4 b=2 a+b=2+2 4 b a c a b c a=3 c=12 b=6 a+b=3+6=9 12 b a c a b c C 12 A B C O AB O BC O
8、 AC O n n A 12 B 15 C 18 D 20 =360 AOB BOC AOC=24 n=360 OC AO BO AB O AOB=360 6=60 BC O BOC=360 10=36 AOC= AOB BOC=60 36 =24 n=360 24 =15 B 15 31 4 24 13 t a n = = 60 t an = =60 60 14 n 1 5 50 200 500 1000 3000 m 0 4 45 188 476 951 2850 0 0.8 0.9 0.94 0.952 0.951 0.95 0.95 7 1 3000 0.95 0.95 3000 0.
9、95 0.95 0.95 15 A 3 y 1 B 0 y 2 y= 2 x 1 2 +3 y 1 y 2 y 1 y 2 y 1 y 2 y 1 =y 2 y 1 y 2 2 3 x= 3 y 1 = 2 x 1 2 +3= 29 x=0 y 2 = 2 x 1 2 +3=1 16 31 29 1 y 1 y 2 y 1 y 2 16 D E AB AC DE BC AD=3 BD=9 DE=2 BC= 8 DE BC ADE ABC AD=3 BD=9 AB=AD+BD=12 DE BC ADE ABC = = BC=8 8 17 ABO O A 2 2 B 4 2 C x O B C A
10、BO C 2 0 10 0 17 31 BOC OBA B O C OBA A 2 2 B 4 2 AB x AB=2 OB= =2 BC OA AOB= CBO ABO= BOC BOC OBA AB OC BC OA OABC OC=AB=2 C 2 0 B O C OBA = = O C =1 0 C 10 0 2 0 10 0 18 P 1 2 P O y A B P BAO=45 B 3 1 1 3 18 31 P BAO=45 B P B 1 OG B 2 OH B 1 x y OG=x B 1 G=y x y B OP P PE x E P 1 2 OE=1 PE=2 OP= =
11、 A MN y MAO NAO P B 1 B 2 B 1 AO=45 B 2 AO=45 B 2 AB 1 =90 B 1 B 2 B 1 B 2 P P B 1 B 2 =2 B 2 OB 1 =90 OB 2 B 1 = B 1 AO=45 B 1 B 2 O OB 1 =OB 2 = = B 1 B 1 G x G B 2 B 2 H y H OGB 1 = OHB 2 =90 GOB 1 + AOB 1 =90 B 2 OH+ AOB 1 =90 GOB 1 = B 2 OH B 1 OG B 2 OH B 1 G=B 2 H OG=OH B 1 x y OG=x B 1 G=y 19 31 B 2 AO=45 AB 2 H B 2 H=AH=B 1 G=y AO=AH+OH=x+y=4 PB= x=1 y=3 B 1 3 1 B 2 1 3 B 3 1 1 3 3 1 1
