高考數(shù)學(xué)復(fù)習(xí)專題13 三角函數(shù)

專題

三角函數(shù)）多選題2019?f(x)sin(2

)

()Af(x)B(

fx)Cf()Df()(

,0)

A

f()sin(2)123(

f(x)f(x)T

22

C(

,0))6

f(x)(

6

,0)

ACD2019?yx)

yx)A

2B

CD

510yyx

5

)5/13

1y)25

1ysinysinx2

10

2(

)x)10

AD2019濟sin(0()A

y2sin()3B(

,0),kC[k

,3k],3DA

xD

，A2342

2

2332x3

3

)

A

3

22sin[]B339/13

2x2

2

53kkZ44[

,3],C42x)x)323DACD2019?()

Ay

Bysinx

Cy2cosx

Dsin(

)xAsinx2cosCCy

)

DBD2019?sin

23

A

Btan

49

C

Dsin2

os

tan

Qsin

cos

cos

)3

25

445sin2599

2sin

cos

?()2()A)

4

()()B1x

/13

C

)88

D(

4

,0)

(x)f(x)2(x)sinx)x2

g)()0

gx)A1x

(x)

BT

23g()(444ABD2019?f()x(

2t()A

B03D

x(,26

tf()4sin(,2,2(sin5]

y

4sinygxy1，BD2019?)A

x

Bysinx

Cycos|x

D)/13

kk

x12

,x[0,yx|,x(

yCtan(2)D422019?)Aytan()3

Bysin(2x)2

Cy|x

Dysinx|

ytan()y)xsin|2x|sinxBD?x|kZy

xcosx(|||tanx|

)A3BC1Dy

xx|sinx||

xx|sinx||xxx|sinx||x|xxtan||cosx||1/13

112019f(x)6A2()

)Byf(x)

Cf()

Df(

Af(xx)AB())xxf()yf(6x

4

BC

2x,x(f(x)(

CDxAD

f(f()f(D332019?)4

)Aytan()2

Byx)2

Cycos(2)Dy2

)BT

Bx

ACysinx0Dycos20x

0x0x

y2yAC2019?(x)sin(2)3Afx)

G)/13

B()[

2

512

]

Cx

12

Dy

3

G

2

A54x3

f(x)f(

)sin[2

)]sin()xGC2xACAC

2ysin2())

D2019f()Asin(0,

2

)

()Ayf)x

Byf()(

,0)Cyf()[

2]6

D(x)1A、f(x)/13

2f(x)ACAg122

f()

ABC22A312

k

f(xx)3

x

f(x)Ax

f(xB

k

k

k

kCDD2019濱f(x)Asin(A

)

f(x)()/13

A

BC

D(

f()sin(A

)

2Ag65g3f(xx

)

Ax

f(x)

x

f(DAC1蘇()sin((),)326()

A

B

C

D

5f(x)(

1)

kk36

(,)6

T…12(x),)6fx)(,)6

f()

)

/13

12

3

6

3

56

(,)126

2612f)(,)126

2

3

6

2

)

3

2

116

3

6

6

f)(,)126

2

3

6

k2

)

53

6

76

3

6

6

2

6

6

BCD10/

f()sin2x)

6

g(x(Ag(x)[]2Bg()[]

Cg()[]2

32Dg(x)[]

1f(x)sin2

g)sin(2)6

2x23

43

x

x1AD2020?()Aa:::sinB:sinCBABC2AsinaCABCAADABC

bsinsinCA

aABC:b:B:2:sinBCBsin2sin2BA2

aCABCsinaABD

aABC11/

bRBsinCRBsinsinACD2019?f(x)xcosxR()AB[1]C(k

0)(Z)Df)

x20

x2k222

[]2

B

DBDBD1112019?f())[m](m)[,]344m()

A

5

B

7

C

D

12/

1[]nm26