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OpenStudy (anonymous):
\[cos^{-1}\left(cos\frac{4\pi}{5}\right)\] since it's within the limits \[0 \le \theta\le \pi\] \[\frac{4\pi}{5}\]
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OpenStudy (anonymous):
@satellite73
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
cool! Thanks!
OpenStudy (anonymous):
yw, you did it not me
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