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Value of expression `sin(pi/9)+sin((2pi)/9)+sin((3pi)/9)+...+sin((17pi)/9)=`

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Value of expression `sin(pi/9)+sin((2pi)/9)+sin((3pi)/9)+...+sin((17pi)/9)=`
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`sin.(pi)/(9)+sin.(2pi)/(9)+sin.(3pi)/(9)+……..+sin.(17pi)/(9)`
`{:(+(sin.(2pi)/(9)+sin.(16pi)/(9))),(" ..."),(" ..."),(+(sin.(8pi)/(9)+sin.(10pi)/(9))),(" "+sin.(9pi)/(9)):}`
= 0
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