The number of x [0,2 ] Î p for which 4 2 42 2sin x 18cos x 2cos x 18sin x +- + = 1 is

Question:

The number of $x \in[0,2 \pi]$ for which

$\left|\sqrt{2 \sin ^{4} x+18 \cos ^{2} x}-\sqrt{2 \cos ^{4} x+18 \sin ^{2} x}\right|=1$ is

  1. 2

  2. 6

  3. 4

  4. 8


Correct Option: 4

JEE Main Previous Year 1 Question of JEE Main from Mathematics Trigonometry chapter.
JEE Main Previous Year Online April 9, 2016

Solution:

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