Find the value of dr.

Find the order an degree of the following differential equations.(4) r (dr)/(d theta) +cos theta =5

Find the equation of a plane which is a distance of 2 units from origin and the d.r's of perpendicular vectors are 2,-1,2 .

Find the equation of a plane which is a distance of 2 units from origin and the d.r's of perpendicular vectors are 2,-1,2 .

If P = (1, 5, 4) and Q = (4, 1, -2) then find the d.r. of PQ.

The positive integers p ,q ,a n dr are all primes if p^2-q^2=r , then find all possible values of rdot

Find the dr's and dc'r of the line joining the points (4,-7,3),(6,-5,2).