9*tan(x/2)

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Solution for 9*tan(x/2) equation: 


D( x )

cos(x/2) = 0

cos(x/2) = 0

cos(x/2) = 0

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

t_1 = pi*k_1+pi/2

x/2-t_1 = 0

1/2*x-t_1 = 0 // + t_1

1/2*x = t_1 // : 1/2

x = t_1/1/2

x = 2*t_1

x = 2*pi*k_1+pi/2 i k_1 należy do I

x in {( -oo : +oo ) / < 2*pi*k_1+pi/2 : 2*pi*k_1+pi/2 >} i k_1 -> {I}

9*tan(x/2) = 0

tan(x/2) = 0

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

t_1 = pi*k_1

x/2-t_1 = 0

1/2*x-t_1 = 0 // + t_1

1/2*x = t_1 // : 1/2

x = t_1/1/2

x = 2*t_1

x = 2*pi*k_1 i k_1 należy do I

9*tan(x/2) = 0  <=>  9 = 0 or 9*tan(x/2) = 0  <=>  tan(x/2) = 0

x = 2*pi*k_1

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