## anonymous 5 years ago HOW DOES THETA VARIES IN PARAMETRIC EQUATION OF SPHERE....LIKE IN UPPER HEMISPHERE,RIGHT HEMISPHERE

$the equation of sphere is x^2+y^2+z^2=a^2 its parametric eqn is x=\rho \sin \phi \cos \theta,y=\rho \sin \phi \sin \theta,z=\rho \cos \phi$ $how does \theta varies$