3sin(7x)/40

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Solution for 3sin(7x)/40 equation: 


x in (-oo:+oo)

(3*sin(7*x))/40 = 0

(3*sin(7*x))/40 = 0 // * 40

3*sin(7*x) = 0

sin(7*x) = 0

sin(7*x) = 0  <=>  7*x = pi*k_1 i k_1 należy do I

t_1 = pi*k_1

7*x-t_1 = 0

7*x-t_1 = 0 // + t_1

7*x = t_1 // : 7

x = t_1/7

x = pi*k_1/7 i k_1 należy do I

3*sin(7*x) = 0  <=>  3 = 0 or 3*sin(7*x) = 0  <=>  sin(7*x) = 0

x = pi*k_1/7

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