Maths-
General
Easy

Question

If 0 less or equal than x less than 2 pi, then the number of real values of x, which satisfy the equationcos invisible function application x plus cos invisible function application 2 x plus cos invisible function application 3 x plus cos invisible function application 4 x equals 0 is :

  1. 5
  2. 7
  3. 9
  4. 3

The correct answer is: 7


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