Solve for x and y `, 1-2x-x^(2)=tan^(2)(x+y)+cot^(2)(x+y)`.

For the equation 1-2x-x^(2)=tan^(2)(x+y)+cot^(2)(x+y)

Solve for x and y : x+y=2and2x-y=1

Solve for x and y : 2^(y-x) (x + y) = 1 and (x + y)^(x - y) = 2 .

Solve for x and y : 2^(y-x) (x + y) = 1 and (x + y)^(x - y) = 2 .

The general solution of the equation tan^(2)(x + y) + cot^(2) ( x+ y) = 1 - 2x - x^(2) lie on the line is :

The general solution of the equation tan^(2)(x + y) + cot^(2) ( x+ y) = 1 - 2x - x^(2) lie on the line is :

Solve the equation tan^(4)x+tan^(4)y+2cot^(2)x cot^(2)y=3+sin^(2)(x+y) for the values of x and y.

Solve the equation (dy)/(dx)=(x^(3)-2x tan^(-1)y)(1+y^(2))

Solve the system of equations tan^2 x + cot^(2) x = 2cos^(2)y cos^(2)y+sin^(2)z=1