3cos(3x/4)

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Solution for 3cos(3x/4) equation: 


x in (-oo:+oo)

3*cos((3*x)/4) = 0

cos((3*x)/4) = 0

cos((3*x)/4) = 0  <=>  (3*x)/4 = pi*k_1+pi/2 i k_1 należy do I

t_1 = pi*k_1+pi/2

(3*x)/4-t_1 = 0

3/4*x-t_1 = 0 // + t_1

3/4*x = t_1 // : 3/4

x = t_1/3/4

x = 4/3*t_1

x = 4/3*pi*k_1+pi/2 i k_1 należy do I

3*cos((3*x)/4) = 0  <=>  3 = 0 or 3*cos((3*x)/4) = 0  <=>  cos((3*x)/4) = 0

x = 4/3*pi*k_1+pi/2

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