If x=`r sin theta cos phi , y=rsin theta sin phi and z=r costheta ` then the value of `sqrt(x^2+y^2+z^2)` will be

If x = rsin theta*cos phi , y = rsin theta*sin phi and z = rcos theta then prove that x^2 + y^2 + z^2 = r^2

If x = a sec theta cos phi, y = b sec thetasin phi and z = c tan theta , then the value of x^2/a^2 + y^2/b^2 -z^2 /c^2 is

If x=r sin theta cos phi, y= r sin theta sin phi, z=r cos theta , prove that x^2+y^2+z^2=r^2 .

If x=r cos theta cos phi , y=r cos theta sin phi and z=r sin theta , then x^(2)+y^(2)+z^(2)=

If x = a sec theta cos phi, y = b sec theta sin phi, z = c tan theta , then, the value of x^2 /a^2 + y^2/b^2 -z^2/c^2 is :

If x=r cos theta cos phi, y=r cos theta sin phi, z=r sin theta , then prove that x^(2)+y^(2)+z^(2)=r^(2).

If x=r sin theta cos varphi,y=r sin theta sin varphi and z=r cos theta, then x^(2)+y^(2)+z^(2)=r^(2)(b)x^(2)+y^(2)-z^(2)=r^(2)(c)x^(2)-y^(2)+z^(2)=r^(2)(d)z^(2)+y^(2)-x^(2)=r^(2)

If x = r cos theta sin phi, y = r sin theta sin phi , and z= r cos phi , prove that x^(2)+y^(2) + z^(2)=r^(2) .

If x=r sin theta cos phi,y=r sin theta sin phi and z=r cos theta,thenx^(2)+y^(2)+ is independent of theta,phi(b)r,theta(c)r,phi(d)r

If cos theta+cos phi=a and sin theta - sin phi=b , then: 2cos(theta + phi) =