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Let y=(cosx+cos2x+cos3x+cos4x+cos5x+cos6...

Let `y=(cosx+cos2x+cos3x+cos4x+cos5x+cos6x+cos7x)/(sinx+sin2x+sin3x+sin4x+sin5x+sin6x+sin7x)`, then which of the following holds good?

A

The value of y `x=pi//8` is not defined.

B

The value of y when `x=pi//16` is 1.

C

The value of y when `x=pi//32` is `sqrt(2)-1`

D

The value of y when `x=pi//48` is `2+sqrt(3)`

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The correct Answer is:
B, D
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