Question

find the value of : cos930°​

Answer 1

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Answer 2

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$Tᴏ \: Fɪɴᴅ : \cos \: 930°$

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$= \cos(900° + 30°)$

$= \cos(5\pi + 30°)$

$= - \cos(30°)$

$= - \frac{ \sqrt{3} }{2}$

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