• A. $\frac{\sqrt{৩}}{৪}{ক}^{২}$
• B. $\frac{\sqrt{৩}}{২}{ক}^{৩}$
• C. $\frac{\sqrt{৩}}{৫}{ক}^{৩}$
• D. $\frac{\sqrt{৩}}{২}{ক}^{৫}$

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. $\frac{5}{11}$
• B. $\frac{1}{2}$
• C. $\frac{3}{5}$
• D. $\frac{6}{11}$

Answer: Option A

Explanation:

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

Answer: Option D

Explanation:

• A. $4\pi -8$
• B. $2\pi -4$
• C. $4\pi +8$
• D. $2\pi +4$

Answer: Option A

Explanation:

• A. $\frac{x+y}{mn}$
• B. $\frac{x+y}{m+n}$
• C. $\frac{mx+ny}{m+n}$
• D. $\frac{mx+ny}{mn}$

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. $35\sqrt{5}$
• B. $40\sqrt{5}$
• C. $45\sqrt{5}$
• D. $50\sqrt{5}$

Answer: Option D

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:

• A. $\frac{\mathrm{\pi rx}}{180°}$ একক
• B. $\frac{\mathrm{rx}}{180°}$ একক
• C. $rx$ একক
• D. $\frac{\mathrm{\pi x}}{180°}$ একক

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. $\frac{\theta }{360}{\mathrm{\pi r}}^2$
• 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. $5\sqrt{3}$ সে.মি
• B. $3\sqrt{5}$ সে.মি
• C. $5\sqrt{5}$ সে.মি
• D. $5\sqrt{2}$ সে.মি

Answer: Option A

Explanation:

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

Answer: Option B

Explanation: