Solve `sin^2x+cos^2y=2sec^2z` for `x , y ,a n dzdot`

Solve sin ^ (2) x + cos ^ (2) y = 2sec ^ (2) z

If x+y=z then cos^(2)x+cos^(2)y+cos^(2)z-2cos x cos y cos z is equal to

Solve the equation 2sin x+cos y=2 for the value of x and y.

Solve: (dy)/(dx)+x sin2y=x^(3)cos^(2)y

If x + y = z then cos ^ (2) x + cos ^ (2) y + cos ^ (2) z-2cos x cos y cos z =

Solve the equation for x and y , |sin x + cos x|^( sin^(2) x-1//4)=1+|siny| and cos^(2)y=1+sin^(2)y .

prove that: cos ^ (2) x + cos ^ (2) y-2cos x * cos y * cos (x + y) = sin ^ (2) (x + y)

Using matrices, solve the following system of equations for x,y and z. 3x-2y+3z=8 , 2x+y-z=1 , 4x-3y+2z=4