Grade 12th pass10 grade maths
The radius of the director circle of hyperbola $$\dfrac{\mathrm x^2}{\mathrm a^2}-\dfrac{\mathrm y^2}{\mathrm b^2}=1$$ is
A. a
B. b
$$\mathrm C.\;\sqrt{\mathrm a^2+\mathrm b^2}\\\mathrm D.\;\sqrt{\mathrm a^2-\mathrm b^2}$$
The radius of the director circle of hyperbola $$\dfrac{\mathrm x^2}{\mathrm a^2}-\dfrac{\mathrm y^2}{\mathrm b^2}=1$$ is
A. a
B. b
$$\mathrm C.\;\sqrt{\mathrm a^2+\mathrm b^2}\\\mathrm D.\;\sqrt{\mathrm a^2-\mathrm b^2}$$
