Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

త్రిభుజం ABCలో A వద్ద లంబకోణంలో ఉంటే, \(\rm \sin\frac{B+C}{2}\cos\frac{B+C}{2}\) విలువ ఎంత?

1
\(\frac{\sqrt3}{4}\)
2
\(\frac{1}{2}\)
3
\(\frac{1}{4}\)
4
√2

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