`2 sin 3y dx + 3x cos 3ydy=0`

sinx sin y dx+cos x cos ydy=0

Solve (2x sin h(y)/(x)+3y cos h (y)/(x)) dx - 3x cos h (y)/(x) dy = 0

cosx cos ydy - sin x sin y dx =0

If y = 2 sin x + 3 cos x, prove that y + (d^2y)/(dx^2) = 0

If y = tan^(-1)((sin 3x - cos 3x )/(sin 3x + cos 3x))" then" (dy)/(dx) =

Consider the system of equations x cos^(3) y+3x cos y sin^(2) y=14 x sin^(3) y+3x cos^(2) y sin y=13 The value of sin^(2) y+2 cos^(2) y is

Consider the system of equations x cos^(3) y+3x cos y sin^(2) y=14 x sin^(3) y+3x cos^(2) y sin y=13 The value of sin^(2)y + 2cos^(2) y is.