1 . tanθ=b

• 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: