Prove that `(cos10^0+sin10^0)/(cos10^0-sin 10^0)=tan55^0`

Explanation

To prove that

\[ \frac{\cos 10^\circ + \sin 10^\circ}{\cos 10^\circ - \sin 10^\circ} = \tan 55^\circ, \]

we will start with the left-hand side and manipulate it step by step.

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