t1=input('t1=') w=50/3*pi a=2/3*pi for t=0:0.0001:t1 b=2*w*(pi-a)*t/pi c=cos(2/3*pi+b) d=sin(2/3*pit1=input('t1=')w=50/3*pia=2/3*pi for t=0:0.0001:t1b=2*w*(pi-a)*t/pic=cos(2/3*pi+b)d=sin(2/3*pi)h=cos(2/3*pi)[x,y,z]=solve('x^2+y^2+z^2=100^2+170^2','x^
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![t1=input('t1=') w=50/3*pi a=2/3*pi for t=0:0.0001:t1 b=2*w*(pi-a)*t/pi c=cos(2/3*pi+b) d=sin(2/3*pit1=input('t1=')w=50/3*pia=2/3*pi for t=0:0.0001:t1b=2*w*(pi-a)*t/pic=cos(2/3*pi+b)d=sin(2/3*pi)h=cos(2/3*pi)[x,y,z]=solve('x^2+y^2+z^2=100^2+170^2','x^](/uploads/image/z/7642553-41-3.jpg?t=t1%3Dinput%28%27t1%3D%27%29+w%3D50%2F3%2Api+a%3D2%2F3%2Api+for+t%3D0%3A0.0001%3At1+b%3D2%2Aw%2A%28pi-a%29%2At%2Fpi+c%3Dcos%282%2F3%2Api%2Bb%29+d%3Dsin%282%2F3%2Apit1%3Dinput%28%27t1%3D%27%29w%3D50%2F3%2Apia%3D2%2F3%2Api+for+t%3D0%3A0.0001%3At1b%3D2%2Aw%2A%28pi-a%29%2At%2Fpic%3Dcos%282%2F3%2Api%2Bb%29d%3Dsin%282%2F3%2Api%29h%3Dcos%282%2F3%2Api%29%5Bx%2Cy%2Cz%5D%3Dsolve%28%27x%5E2%2By%5E2%2Bz%5E2%3D100%5E2%2B170%5E2%27%2C%27x%5E)
t1=input('t1=') w=50/3*pi a=2/3*pi for t=0:0.0001:t1 b=2*w*(pi-a)*t/pi c=cos(2/3*pi+b) d=sin(2/3*pit1=input('t1=')w=50/3*pia=2/3*pi for t=0:0.0001:t1b=2*w*(pi-a)*t/pic=cos(2/3*pi+b)d=sin(2/3*pi)h=cos(2/3*pi)[x,y,z]=solve('x^2+y^2+z^2=100^2+170^2','x^
t1=input('t1=') w=50/3*pi a=2/3*pi for t=0:0.0001:t1 b=2*w*(pi-a)*t/pi c=cos(2/3*pi+b) d=sin(2/3*pi
t1=input('t1=')
w=50/3*pi
a=2/3*pi
for t=0:0.0001:t1
b=2*w*(pi-a)*t/pi
c=cos(2/3*pi+b)
d=sin(2/3*pi)
h=cos(2/3*pi)
[x,y,z]=solve('x^2+y^2+z^2=100^2+170^2','x^2+(z+170*c)
^2=100^2*d^2','y^2+z^2=170^2+100^2*h^2/c^2')
x=subs(x)
y=subs(y)
z=subs(z)
plot3(x,y,z)
end
就是求解这个三元二次方程,然后画出轨迹来,且Y>0的
t1=input('t1=') w=50/3*pi a=2/3*pi for t=0:0.0001:t1 b=2*w*(pi-a)*t/pi c=cos(2/3*pi+b) d=sin(2/3*pit1=input('t1=')w=50/3*pia=2/3*pi for t=0:0.0001:t1b=2*w*(pi-a)*t/pic=cos(2/3*pi+b)d=sin(2/3*pi)h=cos(2/3*pi)[x,y,z]=solve('x^2+y^2+z^2=100^2+170^2','x^
t1=input('t1=') w=50/3*pi a=2/3*pi for t=0:0.0001:t1 b=2*w*(pi-a)*t/pi c=cos(2/3*pi+b) d=sin(2/3*pi
20 - 离问题结束还有 14 天 8 小时
问题补充:t1=input('t1=')
w=50/3*pi
a=2/3*pi
for t=0:0.0001:t1
b=2*w*(pi-a)*t/pi
c=cos(2/3*pi+b)
d=sin(2/3*pi)
h=cos(2/3*pi)
[x,y,z]=solve('x^2+y^2+z^2=100^2+170^2','x^2+(z+170*c)
^2=100^2*d^2','y^2+z^2=170^2+100^2*h^2/c^2')
x=subs(x)
y=subs(y)
z=subs(z)
plot3(x,y,z)