5*cos(4/3*x)

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Solution for 5*cos(4/3*x) equation: 


x in (-oo:+oo)

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

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

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

t_1 = pi*k_1+pi/2

(4/3)*x-t_1 = 0

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

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

x = t_1/4/3

x = 3/4*t_1

x = 3/4*pi*k_1+pi/2 i k_1 należy do I

5*cos((4/3)*x) = 0  <=>  5 = 0 or 5*cos((4/3)*x) = 0  <=>  cos((4/3)*x) = 0

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

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