pachinkoboss
is the inverse sine of sine of ((4pi)/9)) equal pi/9?



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sin(x) = sinx

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sin^1 (sin 4pie/9)

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so 4pie/9

pachinkoboss
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Why not just pi/9?

pachinkoboss
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But
pi/9 is in that range?

myininaya
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Oh. Wait It is.

pachinkoboss
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What is?

myininaya
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lol.
So yeah \[\frac{4 \pi }{9} \in [\frac{\pi}{2}, \frac{\pi}{2}] =>\sin^{1}(\sin(\frac{4 \pi}{9}))=\frac{4 \pi}{9} \]

myininaya
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\[.444 \pi \in [.5 \pi , .5 \pi]\]
Since
\[.444 \in [.5,.5]\]

myininaya
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4/9 is approximately .444 :)