question_answer

If\[{{\mathbf{x}}^{n}}={{\mathbf{a}}^{n}}\,\mathbf{co}{{\mathbf{s}}^{4}}\theta \]and\[{{y}^{n}}={{b}^{m}}{{\sin }^{4}}\theta \], then which of the following will be the best choice?

A) \[\frac{{{x}^{\frac{x}{2}}}}{{{a}^{\frac{m}{2}}}}+\frac{{{y}^{\frac{x}{2}}}}{{{b}^{\frac{m}{2}}}}=1\]           

B) \[\frac{{{x}^{n}}}{{{a}^{n}}}+\frac{{{y}^{n}}}{{{b}^{m}}}=1\]

C) \[\frac{{{x}^{\frac{n}{2}}}}{{{a}^{\frac{n}{2}}}}+\frac{{{y}^{\frac{n}{2}}}}{{{b}^{\frac{m}{2}}}}=1\]

D) All of these

E) None of these