How do you solve $18 cos x - 9 \sqrt{3} = 0$ $18cosx-9sqrt3=0$ ?

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How do you solve $18 cos x - 9 \sqrt{3} = 0$ $18cosx-9sqrt3=0$ ?

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Answer 1 · 2018-05-21T02:48:06

$x = \pm \frac{π}{6} + 2 k π$ $x = +- pi/6 + 2kpi$

Explanation:

$18 cos x = 9 \sqrt{3}$ $18cos x = 9sqrt3$
$cos x = \frac{\sqrt{3}}{2}$ $cos x = sqrt3/2$
Trig table and unit circle give 2 solutions for x:
$x = \pm \frac{π}{6} + 2 k π$ $x = +- pi/6 + 2kpi$

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How do you solve $18 cos x - 9 \sqrt{3} = 0$ $18cosx-9sqrt3=0$ ?

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How do you solve 18cosx-9sqrt3=018cosx−9√3=018cosx-9sqrt3=0?

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How do you solve $18 cos x - 9 \sqrt{3} = 0$ $18cosx-9sqrt3=0$ ?