cos(2x-pi/18)

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Solution for cos(2x-pi/18) equation: 


x in (-oo:+oo)

cos(2*x-(pi/18)) = 0

cos(2*x-(pi/18)) = 0  <=>  2*x-(pi/18) = pi*k_1+pi/2 i k_1 należy do I

t_1 = pi*k_1+pi/2

2*x-t_1-(pi/18) = 0

2*x-t_1-(pi/18) = 0 // + -t_1-(pi/18)

2*x = -(-t_1-(pi/18)) // : 2

x = (-(-t_1-(pi/18)))/2

x = (t_1+pi/18)/2

x = (pi*k_1+pi/2+pi/18)/2 i k_1 należy do I

x = (pi*k_1+pi/2+pi/18)/2

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