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How do you solve $18cosx-9sqrt3=9$ ?

1 Answer

Oct 3, 2016

$x=$ undefined

Explanation:

$18cosx-9sqrt3=9$
$18cosx=9+9sqrt3$
$cosx=(9+9sqrt3)/18$
$x=cos^-1 ((9+9sqrt3)/18)$
$x=$ undefined

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