Mathematics · 2021
JEE Main · 25 July 2021, Shift 1 · Q80
The sum of all values of x in [0,2 π], for which sin x+ sin 2 x+ sin 3 x+ sin 4 x=0, is equal to:
The sum of all values of $\displaystyle x$ in $\displaystyle [0,2 \pi]$, for which $\displaystyle \sin x+\sin 2 x+\sin 3 x+\sin 4 x=0$, is equal to :
Official answer
(2)
$\displaystyle 9 \pi$
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JEE Main 2021 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.