sin(5x)/(4x)

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Solution for sin(5x)/(4x) equation: 


D( x )

4*x = 0

4*x = 0

4*x = 0

4*x = 0 // : 4

x = 0

x in (-oo:0) U (0:+oo)

sin(5*x)/(4*x) = 0

sin(5*x)/(4*x) = 0 // * 4*x

sin(5*x) = 0

sin(5*x) = 0  <=>  5*x = pi*k_1 i k_1 należy do I

t_1 = pi*k_1

5*x-t_1 = 0

5*x-t_1 = 0 // + t_1

5*x = t_1 // : 5

x = t_1/5

x = pi*k_1/5 i k_1 należy do I

x = pi*k_1/5

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