If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x = 0
cos(x) = 0
x = 0
x = 0
cos(x) = 0
cos(x) = 0
cos(x) = 0 <=> x = pi*k_1+pi/2 i k_1 należy do I
t_1 = pi*k_1+pi/2
x-t_1 = 0
x-t_1 = 0 // + t_1
x = t_1
x = pi*k_1+pi/2 i k_1 należy do I
x in {( -oo : +oo ) / {< 0 : 0 > U < pi*k_1+pi/2 : pi*k_1+pi/2 >}} i k_1 -> {I}
(4*tan(x))/x = 0
(4*tan(x))/x = 0 // * x
4*tan(x) = 0
tan(x) = 0
tan(x) = 0 <=> x = pi*k_1 i k_1 należy do I
t_1 = pi*k_1
x-t_1 = 0
x-t_1 = 0 // + t_1
x = t_1
x = pi*k_1 i k_1 należy do I
4*tan(x) = 0 <=> 4 = 0 or 4*tan(x) = 0 <=> tan(x) = 0
x = pi*k_1
| 4tanx/x | | 9a+4a=-39 | | 6m-m=-35 | | 3y+5-y+3+4y= | | 9b-3b=84 | | 2.5(x+4.5)=-2.4 | | (2w)(3w+4)=0 | | 3(x+2)=-3(2t-4) | | 5(x-3)=19 | | -4x+7=-17 | | -9(3x+-5)=-144 | | 6X-12Y= | | 10x^6-13x^3+3=0 | | x+8=-4x+4 | | 7y-2y+3=32 | | 0.33(18x+15)=0.25(4x+12) | | (4+5)4=(x+4+x-2)x-2 | | 14x+6-4x=76 | | 9x^2-3x=-5/36 | | Y-6+8=13 | | 2X-.4=0 | | 3/5v-3/2=1/3 | | 3/5v-3/2=/1/3 | | 7B+30=86 | | -9x+8x-4x=0 | | F-5=-10 | | m-20=6-2m | | 5n-9n=20 | | 3x=2/7=4x-1/5 | | 9r+15r=72 | | 5b-14=8b+1 | | 2-3(m+1)=8 |