Question

Find the size of angle xyz
give ur answer to 1 dec place

Answer 1

`\cos(XYZ )=\cfrac{\stackrel{adjacent}{6}}{\underset{hypotenuse}{15}}\implies \cos(XYZ )=\cfrac{2}{5} \\\\\\ XYZ=\cos^(-1)\left( \cfrac{2}{5} \right)\implies XYZ\approx 66.4^o`

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