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katrin2010 [14]
3 years ago
11

Find the length of MN

Mathematics
1 answer:
serg [7]3 years ago
6 0

Answer:

Is there supposed to be a screenshot?

then again this is your first question .....................

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If you know that \sin\dfrac\pi3=\dfrac12, then you know right away

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###

Otherwise, you can derive the same result. Let \theta=\sin^{-1}\dfrac12, so that \sin\theta=\dfrac12. \sin^{-1} is bounded, so we know -\dfrac\pi2\le\theta\le\dfrac\pi2. For these values of \theta, we always have \cos\theta\ge0.

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  6.  A

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ANSWER:
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