• A. $<AOD=<BOC$
• B. $<AOD=<BOD$
• C. $<BOC=<AOC$
• D. $<AOD=<BOA$

Answer: Option A

Explanation:

• A. $৩ N$
• B. $\sqrt{১১}N$
• C. $\sqrt{৪১}N$
• D. $১ N$

Answer: Option C

Explanation:

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

Answer: Option D

Explanation:

• A. $108\sqrt{3}$
• B. $54\sqrt{3}$
• C. $27\sqrt{3}$
• D. $9\sqrt{3}$

Answer: Option B

Explanation:

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

Answer: Option B

Explanation:

• A. $\frac{1}{x-3}$
• B. $1+\frac{1}{x}$
• C. $5-x^2$
• D. $2+x$

Answer: Option A

Explanation:

• A. ${\mathrm{\pi r}}^2$
• B. ${\mathrm{\pi r}}^2/2$
• C. $4{\mathrm{\pi r}}^2$
• D. কোনটিই নয়

Answer: Option D

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:

• A. $a{x}^2+bx+c=0$
• B. $y^2=ax$
• C. $3x^2+3y^2=15$
• D. $y^2=4x+4$

Answer: Option C

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. ${\sec }^2\theta =1+{\tan }^2\theta$
• 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. $1400x$ টি
• B. $\frac{1400}{100+x}$ টি
• C. $\frac{100+x}{1400}$ টি
• D. $\frac{1400+x}{100}$ টি

Answer: Option B

Explanation:

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

Answer: Option B

Explanation:

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

Answer: Option B

Explanation:

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

Answer: Option A

Explanation: