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f(x) is a periodic function of x with a period of 2π. In the interval -π<x<π,  f(x) is given by

In the expansion of f(x) as a Fourier series of sine and cosine functions, the coefficient of cos 2x is
  • a)
    2/3 π
  • b)
    1/π
  • c)
    0
  • d)
    - 2/3π
Correct answer is option 'D'. Can you explain this answer?
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f(x) is a periodic function of x with a period of 2π. In the interv...

     ( COS X = t )
 
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f(x) is a periodic function of x with a period of 2π. In the interv...

     ( COS X = t )
 
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f(x) is a periodic function of x with a period of 2π. In the interv...

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f(x) is a periodic function of x with a period of 2π. In the interval -π<x<π,f(x) is given byIn the expansion of f(x) as a Fourier series of sine and cosine functions, the coefficient of cos 2x isa)2/3πb)1/πc)0d)- 2/3πCorrect answer is option 'D'. Can you explain this answer?
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