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

Answer: Option C

Explanation:

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

Answer: Option C

Explanation:

• A. $x^2+y^2+4x+14=0$
• B. $x^2+y^2+4x-14y=0$
• C. $x^2+y^2-4x+14y=0$
• D. $x^2+y^2-4x-14y=0$

Answer: Option B

Explanation:

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

Answer: Option C

Explanation:

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

Answer: Option A

Explanation: