• A. $4$
• B. $5$
• C. $8$
• D. $10$

Answer: Option A

Explanation:

• A. ${30}^{°}$
• B. ${60}^{°}$
• C. ${75}^{°}$
• D. ${70}^{°}$

Answer: Option B

Explanation:

• A. $1$
• B. $4$
• C. $2$
• D. $5$

Answer: Option B

Explanation:

• A. $\frac{1}{25}$
• B. $-5$
• C. $\frac{1}{5}$
• D. $-\frac{1}{5}$

Answer: Option B

Explanation:

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

Answer: Option A

Explanation:

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

Answer: Option C

Explanation:

• A. $\frac{1}{3}$
• B. $\frac{1}{5}$
• C. $\frac{3}{5}$
• D. $\frac{5}{3}$

Answer: Option A

Explanation:

• A. $128$
• B. $7$
• C. $9$
• D. $2$

Answer: Option C

Explanation:

• A. $-\sqrt{2}$
• B. $0$
• C. $\sqrt{2}$
• D. $1$

Answer: Option B

Explanation:

• A. $\tan \frac{p}{2}$
• B. $\cot \frac{p}{2}$
• C. $\cos \frac{p}{2}$
• D. $\sin \frac{p}{2}$

Answer: Option B

Explanation:

• A. $\sin 120°=\sin 60°+\sin 60°$
• B. $\sin 120°=2 \sin 60° \cos 60°$
• C. $\sin 120°=2 \sin 60° 60°$
• D. $\sin 120°=-\frac{1}{2}$

Answer: Option B

Explanation:

• A. $\frac{3}{2}$
• B. $\frac{1}{3}$
• C. $\frac{\sqrt{5}}{3}$
• D. $\frac{1}{2}$

Answer: Option C

Explanation:

• A. 1
• B. 2
• C. 3
• D. 4

Answer: Option D

Explanation:

• A. $10$
• B. $e$
• C. $2$
• D. $2\sqrt{5}$

Answer: Option D

Explanation:

• A. $2$
• B. $4$
• C. $24$
• D. $22$

Answer: Option B

Explanation: