test

test

12th Grade

35 Qs

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test

test

Assessment

Quiz

Mathematics

12th Grade

Practice Problem

Hard

Created by

TOAN LEE VAN

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35 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cho tam giác ABC có b = 6, c = 8, A = 60^\circ. Độ dài cạnh a bằng

2\sqrt{13}
\sqrt{20}
3\sqrt{12}
2\sqrt{37}

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Khẳng định nào sau đây là đúng?

\sin\alpha = -\sin\left( 180^\circ - \alpha \right)
\cot\alpha = \cot\left( 180^\circ - \alpha \right)
\cos\alpha = -\cos\left( 180^\circ - \alpha \right)
\tan\alpha = \tan\left( 180^\circ - \alpha \right)

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cho hai góc nhọn \alpha, \beta, \alpha < \beta. Khẳng định nào sau đây là \textbf{sai}?

\cos\alpha < \cos\beta
\sin\alpha < \sin\beta
\tan\alpha + \tan\beta > 0
\cot\alpha + \cot\beta > 0

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Điểm A(-1;3) thuộc miền nghiệm của bất phương trình nào sau đây?

3x - y > 0
-3x + 2y > 7
x + 3y \leq 0
x + 3y \leq 0

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cho biết \tan \alpha = \sqrt{3}. Tính \cot \alpha.

\cot \alpha = \dfrac{\sqrt{3}}{3}
\cot \alpha = \sqrt{3}
\cot \alpha = \dfrac{1}{3}
\cot \alpha = 3

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Với giá trị thực nào của x mệnh đề chứa biến P(x)\colon \lq\lq2x^2 - 3 < 0\rq\rq\, là mệnh đề đúng?

1
-2
5
2

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

\immini{ Phần không gạch chéo (không tính bờ) trong hình dưới đây là miền nghiệm của hệ bất phương trình nào sau đây? }{ \begin{tikzpicture}[>=stealth,line join=round,line cap=round,font=\footnotesize,scale=0.85] \draw[->,line width = 1pt] (-2,0)--(0,0) node[below left]{O}--(3.5,0) node[below]{x}; \draw[->,line width = 1pt] (0,-1) --(0,4.5) node[right]{y}; \fill (2,0) node[below left]{2} circle (1pt); \fill (0,3) node[left]{3} circle (1pt); \draw [thick, domain=-1:2.7, samples=100] plot (\x, {-1.5*(\x) + 3}); \fill[opacity=.2,pattern= horizontal lines] (-1,4.5)--(2.67,-1)--(3.3,-1)--(3.3,4.5)--cycle; \fill[opacity=.2,pattern=north east lines] (-2,0)--(-2,-1)--(3.3,-1)--(3.3,0)--cycle; \end{tikzpicture} }

\heva{&y > 0\\&3x + 2y < 6}
\heva{&y \geq 0\\&3x + 2y \leq 6}
\heva{&x > 0\\&3x + 2y > -6}
\heva{&x > 0 \\&3x + 2y < 6}

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