In a ABC - sin 2 A -sin 2 B -sin 2 C is equal toA- 2 sin A sin B cos CB- 2 sin A cos B cos C- 2 sin A cos B sin CD- 2 sin A sin B sin C

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Conditional Identities

In a ABC , si...

Question

In a $△ A B C,$ ${sin}^{2} A - {sin}^{2} B + {sin}^{2} C$ is equal to

2 sin A sin B cos C

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2 sin A cos B sin C

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2 sin A cos B cos C

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2 sin A sin B sin C

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A + B + C = \frac{π}{2},

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△ A B C, \frac{sin 2 A + sin 2 B + sin 2 C}{sin A + sin B + sin C}

△ A B C

∣ ∣ ∣ ∣ \begin{matrix} 1 & a & b 1 & c & a 1 & b & c \end{matrix} ∣ ∣ ∣ ∣ = 0

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△ A B C

sin 2 A + sin 2 B - sin 2 C = 4. cos A . cos B . cos C

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