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Normal to General Sphere
For:
$$x^2+y^2+z^2+2gx+2fy+2hz+c=0$$
at $$P(x_1,y_1,z_1)$$, the normal has direction ratios:
$$x_1+g:y_1+f:z_1+h$$
Usage
- Used to obtain the normal direction directly from the general sphere equation.
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Normal to General Sphere
For:
$$x^2+y^2+z^2+2gx+2fy+2hz+c=0$$
at $$P(x_1,y_1,z_1)$$, the normal has direction ratios:
$$x_1+g:y_1+f:z_1+h$$
Usage
- Used to obtain the normal direction directly from the general sphere equation.
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