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How don’t know how to do this i don’t if I sit it up right

How Dont Know How To Do This I Dont If I Sit It Up Right class=

Answer :

Given:-

A triangle with side length 3 and 12.

To find the value of angle A.

So the formula used is,

[tex]CosA=\frac{Adjacent\text{ side}}{Hypotneus}[/tex]

Substituting the values. we get,

[tex]\begin{gathered} CosA=\frac{3}{12} \\ A=cos^{-1}(\frac{1}{4}) \\ A=75.52 \end{gathered}[/tex]

So the value of A is 75.52 degree.

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