San0phi San0phi

28-11-2015
Mathematics

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if theta is an acute angle and sin=1/2 , then cos theta =

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evancohen97 evancohen97

28-11-2015

\(\pi /6\) is the only acute angle whose sin = 1/2. Therefore, cos (\(\pi /6\)) = \(\sqrt{3} /2\)

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