If $\sin 2 \theta = \frac{21}{25}$ and $\cos \theta - \sin \theta > 0,$ then compute $\cos \theta - \sin \theta.$
Question:
If $\sin 2 \theta = \frac{21}{25}$ and $\cos \theta - \sin \theta > 0,$ then compute $\cos \theta - \sin \theta.$
Answer:
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If $\sin 2 \theta = \frac{21}{25}$ and $\cos \theta - \sin \theta > 0,$ then compute $\cos \theta - \sin \theta.$
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