• A. $\left[\begin{array}{cc}3& 2\\ -4& 5\end{array}\right]$
• B. $\left[\begin{array}{cc}3& -4\\ -2& 5\end{array}\right]$
• C. $\left[\begin{array}{cc}4& -5\\ 3& 2\end{array}\right]$
• D. $\left[\begin{array}{cc}3& 4\\ 2& 5\end{array}\right]$

Answer: Option B

Explanation:

• A. $R=2\sqrt{h{h}^{,}}$
• B. $R=4\sqrt{h+h^{,}}$
• C. $R=2\sqrt{h+h^{,}}$
• D. $R=4\sqrt{h{h}^{,}}$

Answer: Option D

Explanation:

• A. $\frac{1}{15}$
• B. $\frac{36}{65}$
• C. $\frac{1}{2}$
• D. $\frac{8}{15}$

Answer: Option B

Explanation:

• A. $x^2+y^2-25x=0$
• B. $3x^2+3y^2-25y=0$
• C. $x^2+y^2+25x=0$
• D. $3x^2+3y^2-25x=0$

Answer: Option D

Explanation:

• A. $\frac{\pi }{4}$
• B. $\frac{\pi }{3}$
• C. $\frac{2\pi }{3}$
• D. $\frac{5\pi }{4}$

Answer: Option D

Explanation:

• A. $f\left(x\right)>0$
• B. $f\text{'}\left(x\right)>0$
• C. $f\text{'}\text{'}\left(a\right)>0$
• D. $f\text{'} \text{'}\left(a\right)<0$

Answer: Option D

Explanation:

• A. $8 m{s}^{-2}$
• B. $12 m{s}^{-2}$
• C. $36 m{s}^{-2}$
• D. $42 m{s}^{-2}$

Answer: Option C

Explanation:

• A. $\frac{1}{2}$
• B. $\frac{1}{6}$
• C. $\frac{1}{3}$
• D. $\frac{2}{3}$

Answer: Option A

Explanation:

• A. $\sqrt{2} \left(\cos \frac{\mathrm{\pi }}{4}) + i \sin \frac{\mathrm{\pi }}{4}\right)$
• B. $\sqrt{2} \left(\cos \frac{\mathrm{\pi }}{6} + i \sin \frac{\mathrm{\pi }}{6}\right)$
• C. $\sqrt{3} \left(\cos \frac{\mathrm{\pi }}{4}) + i \sin \frac{\mathrm{\pi }}{4}\right)$
• D. $\sqrt{3} \left(\cos \frac{\mathrm{\pi }}{6} + i \sin \frac{\mathrm{\pi }}{6}\right)$

Answer: Option A

Explanation:

• A. $x=n\mathrm{\pi }, n\in \mathrm{\mathbb{Z}}$
• B. $x=\frac{\mathrm{\pi }}{2}+2n\mathrm{\pi },n\in \mathrm{\mathbb{Z}}$
• C. $x=2n\mathrm{\pi } , n\in \mathrm{\mathbb{Z}}$
• D. $x=\frac{3\mathrm{\pi }}{2}+2n\mathrm{\pi },n\in \mathrm{\mathbb{Z}}$

Answer: Option A

Explanation:

• A. $y^2=(x+3{)}^2+(y+2{)}^2$
• B. $x^2=(x-3{)}^2+(y-2{)}^2$
• C. $x^2=(x-3{)}^2+(y-2{)}^2$
• D. $y^2=(x-3{)}^2+(y-2{)}^2$

Answer: Option D

Explanation:

• A. $v = \sqrt{u^2- 2gh}$
• B. $v = -\sqrt{u^2- 2gh}$
• C. $v = \sqrt{u^2+ 2gh}$
• D. $v = -\sqrt{u^2+ 2gh}$

Answer: Option A

Explanation:

• A. $900m/s^2$
• B. $30 m/s^2$
• C. $36 m/s^2$
• D. $45 m/s^2$

Answer: Option C

Explanation:

• A. $x^2+y^2-6x+4y+12=0$
• B. $x^2+y^2-4x+6y+12=0$
• C. $x^2+y^2-6x+4y-12=0$
• D. $x^2+y^2-4x+6y-12=0$

Answer: Option B

Explanation:

• A. $\frac{1}{\sqrt{3}}$
• B. $\frac{2}{\sqrt{3}}$
• C. $\frac{\sqrt{3}}{2}$
• D. $\sqrt{3}$

Answer: Option A

Explanation: