• A. $12/5$
• B. $13/12$
• C. $25/144$
• D. $-\frac{13}{12}$

Answer: Option B

Explanation:

• A. $a^2$
• B. $\frac{\sqrt{3a^2}}{4}$
• C. ${\mathrm{\pi a}}^2$
• D. $\frac{4a^2}{3}$

Answer: Option B

Explanation:

• A. $\frac{\theta }{360}{\mathrm{\pi r}}^2$
• B. $\frac{\theta }{90}{\mathrm{\pi r}}^2$
• C. $\frac{\theta }{210}{\mathrm{\pi r}}^2$
• D. $\frac{\theta }{180}{\mathrm{\pi r}}^2$

Answer: Option A

Explanation:

• A. ${\sin }^{2}A+{\cos }^{2}B=1$
• B. $\sin \theta +\cos \theta >1$
• C. $\sin \theta +\cos \theta <1$
• D. ${\tan }^2-{\sec }^2\theta =1$

Answer: Option B

Explanation:

• A. $25$
• B. $115$
• C. $18$
• D. কোনোটিই নয়

Answer: Option D

Explanation:

• A. $5/13$
• B. $13/5$
• C. $12/13$
• D. $13/12$

Answer: Option D

Explanation:

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

Answer: Option B

Explanation:

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

Answer: Option C

Explanation:

• A. $1400x$ টি
• B. $\frac{1400}{100+x}$ টি
• C. $\frac{100+x}{1400}$ টি
• D. $\frac{1400+x}{100}$ টি

Answer: Option B

Explanation:

• A. $a^6-1$
• B. $\left(a-a\right)\left(a^3+1\right)$
• C. $\left(a^4+1\right)\left(a-1\right)$
• D. $a^6+1$

Answer: Option A

Explanation:

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

Answer: Option B

Explanation:

• A. $9$
• B. $10$
• C. $12$
• D. কোনোটিই নয়

Answer: Option B

Explanation:

• A. ${\sec }^2\theta =1+{\tan }^2\theta$
• B. ${\sec }^2=1-{\tan }^2\theta$
• C. $\tan \theta =\frac{\cos \theta }{\sin \theta }$
• D. ${\sin }^2\theta -{\cos }^2\theta =1$

Answer: Option A

Explanation:

• A. $\frac{n\left(n+1\right)}{2}$
• B. $\frac{n^2{\left(n+1\right)}^2}{4}$
• C. $n^2$
• D. $\frac{n\left(n+1\right)\left(n+2\right)}{6}$

Answer: Option A

Explanation:

• A. ${\mathrm{\pi r}}^2$
• B. $2{\mathrm{r}}^2\mathrm{\pi }$
• C. $2\mathrm{\pi r}$
• D. কোনোটিই নয়

Answer: Option A

Explanation: