• A. $0$
• B. $\frac{1}{2}$
• C. $1$
• D. $-1$

Answer: Option B

Explanation:

• A. $\mathrm{\pi }$
• B. $\infty$
• C. $1‵$
• D. $\varnothing$

Answer: Option C

Explanation:

• A. tan(t / 2)
• B. cot(t / 2)
• C. tan(2 / t)
• D. cot(2 / t)

Answer: Option A

Explanation:

• A. ${\tan }^{-1}\left(\frac{3}{4}\right)$
• B. ${\cos }^{-1}\left(\frac{4}{5}\right)$
• C. ${\sin }^{-1}\left(\frac{5}{3}\right)$
• D. ${\sin }^{-1}\left(\frac{3}{4}\right)$

Answer: Option B

Explanation:

• A. Tk. 5,00,000
• B. Tk. 4,00,000
• C. Tk. 6,00,000
• D. Tk. 8,00,000

Answer: Option D

Explanation:

• A. -5
• B. -3
• C. 5
• D. 3

Answer: Option A

Explanation:

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

Answer: Option B

Explanation:

• A. $\frac{1}{3^6}$
• B. $\frac{2}{3^8}$
• C. $\frac{\sqrt{3}}{3^9}$
• D. $\frac{4}{3^8}$

Answer: Option B

Explanation:

• A. $9x^2-12x+5=0$
• B. $5x^2-4x+1=0$
• C. $5x^2+4x+1=0$
• D. $25x^2-20x+3=0$

Answer: Option B

Explanation:

• A. $\frac{\mathrm{\pi }}{4}$
• B. $\mathrm{\pi }$
• C. $-\frac{\mathrm{\pi }}{4}$
• D. $-\frac{3\mathrm{\pi }}{4}$

Answer: Option C

Explanation:

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

Answer: Option A

Explanation:

• A. $2x^2+2x+1=0$
• B. $x^2+1=0$
• C. $2x^2-2x+1=0$
• D. $4x^2-4x+1=0$

Answer: Option C

Explanation:

• A. 2
• B. 3
• C. 4
• D. $\sqrt{2}$

Answer: Option C

Explanation:

• A. $\pm \frac{2}{3}$
• B. $\pm \frac{\sqrt{15}}{6}$
• C. $\pm \frac{7}{6}$
• D. $\pm \frac{\sqrt{23}}{6}$

Answer: Option D

Explanation:

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

Answer: Option B

Explanation: