A) \[p=\frac{1}{\sqrt{1+2\cos \theta }},\]\[q=\frac{-2\cos \theta }{\sqrt{1+2\cos \theta }},\]\[r=\frac{1}{\sqrt{1+2\cos \theta }}\]
B) \[p=\frac{-2\cos \theta }{\sqrt{1+2\cos \theta }},\]\[q=\frac{1}{\sqrt{1+2\cos \theta }},\]\[r=\frac{1}{\sqrt{1+2\cos \theta }}\]
C) \[p=\frac{1}{\sqrt{1+2\cos \theta }},\]\[q=\frac{1}{\sqrt{1+2\cos \theta }},\]\[r=\frac{-2\cos \theta }{\sqrt{1+2\cos \theta }}\]
D) \[p=\frac{1}{\sqrt{1+2\cos \theta }},\]\[q=\frac{-2\cos \theta }{\sqrt{1+2\cos \theta }},\]\[r=\frac{-1}{\sqrt{1+2\cos \theta }}\]
E) None of these
Correct Answer: A
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