3cos((pi*x)/2)

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Solution for 3cos((pi*x)/2) equation: 


x in (-oo:+oo)

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

cos((pi*x)/2) = 0

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

t_1 = pi*k_1+pi/2

(pi*x)/2-t_1 = 0

(pi/2)*x-t_1 = 0 // + t_1

(pi/2)*x = t_1 // : pi/2

x = t_1/(pi/2)

x = pi*k_1+pi/2/(pi/2) i k_1 należy do I

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

x = pi*k_1+pi/2/(pi/2)

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