If x and y are the real numbers satisfying the equation `12sinx + 5cos x = 2y^2 - 8y +21`, then the value of `12cot((xy)/2)` is:

If x and y are the solutions of the equation 12sinx+5cos x=2y^(2)-8y+21 , then the value of 12cot((xy)/(2)) is (Given, |x| lt pi )

If x and y are the solutions of the equatiion 12sinx+5cosx=2y^2-8y+21 the value of 144cot(xy/2) is

If x and y are the solutions of the equatiion 12sinx+5cosx=2y^2-8y+21 the value of 144cot(xy/2) is

If 8x^2 + y^2 -12x -4xy+9 =0 , then the value of (14x-5y) is:

If x+y=12 and xy=32 then the value of (x^2+y^2) is:

If 12sinx+5cosx=2y^(2)-8y+21 , to get values of x and y is

If x=2npi+tan^(-1).(p)/(q) and y=r is a solution of the equation 12sinx+5cosx=2y^(2)-8y+21 , then the value of k, such that sqrt(p^(2)+q^(2)+kr^(2))=15 , is equal to

If x=2npi+tan^(-1).(p)/(q) and y=r is a solution of the equation 12sinx+5cosx=2y^(2)-8y+21 , then the value of k, such that sqrt(p^(2)+q^(2)+kr^(2))=15 , is equal to

If x,y, z are real numbers satisfying the equation 25(9x^(2) + y^(2)) + 9z^(2)- 15 (5xy + yz + 3zx)= 0 then x,y, z are in

If x,y,z are real numbers satisfying the equation 25(9x^2+y^2)+9z^2-15(5xy+yz+3zx)=0 then prove that x,y,z are in AP.