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If 0 <= x < 2pi, then the number of real...

If `0 <= x < 2pi`, then the number of real values of x, which satisfy the equation `cos x + cos 2x + cos 3x + cos 4x = 0`;

A

`5`

B

`7`

C

`9`

D

`3`

Text Solution

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The correct Answer is:
B
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