In Δ A B C ; with usual notations, b s i n B - c s i n C sin ⁡ B - C = ……

Question

In Δ A B C ; with usual notations, b s i n B - c s i n C sin ⁡ B - C = ……, b, a + b + c, a, c

MARKS App · Accepted Answer

We have, b s i n B - c s i n C sin ⁡ B - C = k s i n B s i n B - k s i n C s i n C sin ⁡ B - c (Using Sine rule) = k s i n 2 B - s i n 2 C sin ⁡ B - c = k s i n B + C sin ⁡ B - C sin ⁡ B - C = k s i n B + C = k s i n 180 o - A = k s i n A = a

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