$$\frac{{{\text{tan}}\theta+ \cot \theta }}{{{\text{tan}}\theta- \cot \theta }} = 2,$$$$\left( {0 \leqslant \theta\leqslant {{90}^ \circ }} \right),$$then the value of $$\sin \theta $$is?

• A. $\frac{2}{{\sqrt 3 }}$$
• B. $\frac{{\sqrt 3 }}{2}$$
• C. $\frac{1}{2}$$