Maharashtra State BoardHSC Arts 12th Board Exam
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In ΔABC, a = 3, b = 4 and sin A = 34, find ∠B - Mathematics and Statistics

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Sum

In ΔABC, a = 3, b = 4 and sin A = `3/4`, find ∠B

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Solution

By sine rule,

`"a"/(sin "A") = "b"/(sin "B")`

∴ `3/(3/4) = 4/(sin "B")`

∴ sin B = 1 = `sin  pi/2`

∴ ∠B = `pi/2`

Concept: Solutions of Triangle
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