1. $\cot \theta -\tan \theta =\frac{6}{5}$

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

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