The value of ‚âà√≠¬¨¬± in the pass band of constant k-low pass filter is?$

2 cosh-1‚Äö√Ñ√∂‚àö√ñ¬¨‚àû(fc/f)

cosh-1‚Äö√Ñ√∂‚àö√ñ¬¨‚àû‚Äö√Ñ√∂‚àö√ñ¬¨‚àû(fc/f)

cosh-1‚Äö√Ñ√∂‚àö√ñ¬¨‚àû(f/fc)

2 cosh-1‚Äö√Ñ√∂‚àö√ñ¬¨‚àû(f/fc)

The value of ‚âà√≠¬¨¬± in the pass band of constant k-low

1.	The value of ‚âà√≠¬¨¬± in the pass band of constant k-low pass filter is?$
A.	2 cosh<sup>-1</sup>‚Äö√Ñ√∂‚àö√ñ¬¨‚àû(f<sub>c</sub>/f)
B.	cosh<sup>-1</sup>‚Äö√Ñ√∂‚àö√ñ¬¨‚àû‚Äö√Ñ√∂‚àö√ñ¬¨‚àû(f<sub>c</sub>/f)
C.	cosh<sup>-1</sup>‚Äö√Ñ√∂‚àö√ñ¬¨‚àû(f/f<sub>c</sub>)
D.	2 cosh<sup>-1</sup>‚Äö√Ñ√∂‚àö√ñ¬¨‚àû(f/f<sub>c</sub>)
Answer» E.