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sin10^(@)+sin20^(@)+sin40^(@)+sin50^(@)-...

`sin10^(@)+sin20^(@)+sin40^(@)+sin50^(@)-sin70^(@)-sin80^(@)=`

A

0

B

`1//2`

C

`3//4`

D

`-1//2`

Text Solution

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The correct Answer is:
A
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