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

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. $\sin \theta =\frac{b}{a^2+b^2}$
• 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. $\sqrt{8}$
• B. $3$
• C. $\sqrt{3}$
• D. $8$

Answer: Option B

Explanation:

• A. 0°
• B. 30°
• C. 45°
• D. 60°

Answer: Option B

Explanation:

• A. 45°
• B. 30°
• C. 60°
• D. 70°

Answer: Option A

Explanation:

• A. 0°
• B. 45°
• C. 30°
• D. 60°

Answer: Option C

Explanation:

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

Answer: Option A

Explanation:

• A. $\frac{5}{12}$
• B. $\frac{12}{5}$
• C. $\frac{13}{5}$
• D. $\frac{13}{5}$

Answer: Option C

Explanation:

• A. $3/4$
• B. $5/12$
• C. $12/13$
• D. $5/13$

Answer: Option B

Explanation:

• A. $4/3$
• B. $3/4$
• C. $3/5$
• D. $5/4$

Answer: Option A

Explanation:

• A. $\frac{5}{4}$
• B. $\frac{4}{9}$
• C. $\frac{3}{5}$
• D. $\frac{5}{3}$

Answer: Option D

Explanation:

• A. $3/4$
• B. $4/3$
• C. $7/8$
• D. $8/7$

Answer: Option B

Explanation:

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

Answer: Option C

Explanation:

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

Answer: Option A

Explanation: