4cos(3x-(x/2))

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Solution for 4cos(3x-(x/2)) equation: 


x in (-oo:+oo)

4*cos(3*x-(x/2)) = 0

cos(3*x-(x/2)) = 0

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

t_1 = pi*k_1+pi/2

3*x-t_1-(x/2) = 0

5/2*x-t_1 = 0 // + t_1

5/2*x = t_1 // : 5/2

x = t_1/5/2

x = 2/5*t_1

x = 2/5*pi*k_1+pi/2 i k_1 należy do I

4*cos(3*x-(x/2)) = 0  <=>  4 = 0 or 4*cos(3*x-(x/2)) = 0  <=>  cos(3*x-(x/2)) = 0

x = 2/5*pi*k_1+pi/2

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