1 . cotθ-tanθ=65

• A. $\theta \frac{1}{2}{\cos }^{-1}\left(\frac{5}{\sqrt{34}}\right)$
• B. $\theta \frac{1}{2}{\cos }^{-1}\left(\frac{3}{\sqrt{34}}\right)$
• C. $\theta \frac{1}{2}{\cos }^{-1}\left(\frac{10}{\sqrt{34}}\right)$
• D. $\theta \frac{1}{2}{\cos }^{-1}\left(\frac{3}{\sqrt{34}}\right)$

Answer: Option B

Explanation: