• A. ৯০ ডিগ্রী
• B. ৬০ ডিগ্রী
• C. ৩০ ডিগ্রী
• D. ১২০ ডিগ্রী

Answer: Option A

Explanation:

• A. 5
• B. 10
• C. 15
• D. 20

Answer: Option B

Explanation:

• A. $b^2-4ac=0$
• B. $b^2-4ac>0$
• C. $b^2-4ac<0$
• D. $b^2-4ac\#0$

Answer: Option A

Explanation:

• A. $১০০°$
• B. $৯০°$
• C. $৮০°$
• D. $৬৫°$

Answer: Option C

Explanation:

• A. 25
• B. $\frac{1}{6}$
• C. $\frac{1}{5}$
• D. $\frac{1}{36}$

Answer: Option C

Explanation:

• A. -1
• B. 1
• C. $\frac{1}{2}$

Answer: Option B

Explanation:

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

Answer: Option B

Explanation:

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

Answer: Option C

Explanation:

• A. 35.5
• B. 72
• C. 71
• D. 36

Answer: Option A

Explanation:

• A. $49 \pi / 3$
• B. $36\pi$
• C. $15 \sqrt{2\pi }$
• D. $3 \sqrt{2\pi }$
• E. None

Answer: Option B

Explanation:

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

Answer: Option B

Explanation:

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

Answer: Option A

Explanation:

• A. $-\frac{1}{2}\left(x+\frac{1}{x^2}\right)$
• B. $\frac{1}{2}\left(x-\frac{1}{x^2}\right)$
• C. $\frac{1}{2}\left(x^2+\frac{1}{x^2}\right)$
• D. $\frac{1}{2}\left(\frac{1}{x^2}-x\right)$

Answer: Option D

Explanation:

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

Answer: Option A

Explanation:

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

Answer: Option D

Explanation: