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trigonometry · worked example

Solve cos(30°)

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Problem

$\cos(30°)$

Step-by-step solution

$30$ - $60$ - $90$ مثلث میں، اضلاع $1 : \sqrt{3} : 2$ کے تناسب میں ہیں۔
$30°$ کی کوسائن = مجاور/وتر = $\frac{\sqrt{3}}{2}$ ۔

Answer

$\cos(30°) = \tfrac{\sqrt{3}}{2}$

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