1 . sec-1x= cosec-1y

• A. $x^2+y^2=1$
• B. $\frac{1}{x^2}+\frac{1}{y^2}=1$
• C. $\frac{1}{x} + \frac{1}{y}= \frac{x}{2}$
• D. $x + y = \frac{x}{2}$

Answer: Option B

Explanation: