$\"\"$

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The sum of the angles in any triangle is $\"\"$ .

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The length of side is $\"\"$ .

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The two angles are $\"\"$ and $\"\"$ .

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The remaining angle $\"\"$ .

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$\"\"$ .

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Law of sines : $\"\"$ .

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Substitute $\"\"$ , $\"\"$ and $\"\"$ in the above equation.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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Law of sines : $\"\"$ .

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Substitute $\"\"$ , $\"\"$ and $\"\"$ in the above equation.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ , $\"\"$ and $\"\"$ .