Specifying two angles
and
and a side
opposite
uniquely determines a triangle
with area
(1)
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(2)
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The third angle is given by
(3)
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since the sum of angles of a triangle is (
radians). Solving the law
of sines
(4)
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for gives
(5)
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Finally,
(6)
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(7)
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(8)
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