I'm stuck on this question. I jest keep getting a really long answer that goes nowhere. THanks in advance.
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Originally Posted by DaCoo911 I'm stuck on this question. I jest keep getting a really long answer that goes nowhere. THanks in advance. LS $\displaystyle = \frac{\cos x - \sin x}{\cos x + \sin x}\cdot \frac{\cos x - \sin x}{\cos x - \sin x} = \frac{\cos^2 x - 2 \sin x \cos x + \sin^2 x}{\cos^2 x-\sin^2 x} = \frac{1 - \sin 2x}{\cos 2x} $ $\displaystyle =\frac{1}{\cos 2x} - \frac{\sin2x}{\cos 2x} = $ RS
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