Question

$<marquee bgcolor="black">$$\tiny\it\color{white}{if \: A,Band \: c \: are \: interior \: angles \: of \: a \: ABC,then \: show \: that}$
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$\color{white}{ \sin( \frac{b + c}{2} ) = \frac{a}{2} }$
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Answer 1

Answer:

$<marquee bgcolor="black">$$\tiny\it\color{white}{if \: A,Band \: c \: are \: interior \: angles \: of \: a \: ABC,then \: show \: that}$

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$\color{white}{ \sin( \frac{b + c}{2} ) = \frac{a}{2} }$ GOOD NIGHT

Answer 2

Not understanding your Q. sorry