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## JenniferSmart1 $cos^{-1}\left(cos\frac{4\pi}{5}\right)$ since it's within the limits $0 \le \theta\le \pi$ $\frac{4\pi}{5}$ one year ago one year ago

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1. JenniferSmart1

@satellite73

2. satellite73

yes

3. JenniferSmart1

cool! Thanks!

4. satellite73

yw, you did it not me