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学历语言类 | 国外英语考试

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美国学术能力评估考试(SAT)

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单选题 If tan 10° = cotθ, then θ= ______.

A

10°

B

80°

C

70°

D

-10°

E

90°

单选题 (6sin x) (3sin x)-(9cos x) (-2cos x) = ______.

A

1

B

-18

C

18

D

-1

E

18sin2x-18cos2x

单选题 If cos (45 + 2x)° = sin (3x)°, then x = ______.

A

18°

B

27 °

C

45°

D

22.5°

E

单选题 In the following figure, which of the following must be true? I. cot x = 3/4 II. cos x = sin y III. tan x = tan y

A

I only

B

II only

C

II and III only

D

I and II only

E

I, II, and III

单选题 ______.

A

-1

B

sin 3θ cos 3θ

C

sin 9θ + cos 9θ

D

1

E

sec 3θ

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