• A. $\sin \theta$
• B. $-\sin \theta$
• C. $\cos \theta$
• D. $-\cos \theta$

Answer: Option C

Explanation:

• A. $-\frac{5}{13}$
• B. $-\frac{13}{5}$
• C. $\frac{5}{13}$
• D. $\frac{13}{5}$

Answer: Option D

Explanation:

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

Answer: Option C

Explanation:

• A. $\sin \theta =\frac{b}{a^2+b^2}$
• B. $\cos \theta =\frac{a}{\sqrt{a^{2+}}{b}^2}$
• C. $\sec \theta =\frac{a^2+b^2}{a}$
• D. $\csc \theta =\frac{a^2+b^2}{a}$

Answer: Option B

Explanation:

• A. $\infty$
• B. $-\infty$
• C. $1$
• D. $-1$

Answer: Option A

Explanation:

• A. 45 ডিগ্রী
• B. 30 ডিগ্রী
• C. 60 ডিগ্রী
• D. 70 ডিগ্রী

Answer: Option A

Explanation:

• A. 80°
• B. 50°
• C. 60°
• D. 70°
• E. None of them

Answer: Option C

Explanation:

• A. 50ডিগ্রী
• B. 60ডিগ্রী
• C. 70ডিগ্রী
• D. 80ডিগ্রী
• E. None of them

Answer: Option B

Explanation:

• A. 40
• B. 50
• C. 60
• D. 70

Answer: Option B

Explanation:

• A. Normal line
• B. Secant line
• C. Limit
• D. Derivative

Answer: Option A

Explanation:

• A. 90.0 dynes/cm
• B. 45.63 dynes/cm
• C. 82.5 dynes/cm
• D. 72.14 dynes/cm
• E. None

Answer: Option D

Explanation:

• A. 7.5 m
• B. 8.5 m
• C. 10.5m
• D. 12.5m

Answer: Option A

Explanation:

• A. 23
• B. 45
• C. 47
• D. 67

Answer: Option D

Explanation:

• A. সমবাহু
• B. সমদ্বিবাহু
• C. সমকোণী
• D. বিষমবাহু

Answer: Option C

Explanation:

• A. 4
• B. 1
• C. -1

Answer: Option B

Explanation: