Solve the equation: `sec^2xtany \ dx+sec^2ytanx \ dy=0`

Find the general solution of the differential equations sec^2xtany dx+sec^2ytanx dy=0

Find the general solution of the differential equations sec^2xtany dx+sec^2ytanx dy=0

Solve sec^(2)x tany dx+sec^(2)y tanx dy=0

Solve the equation sec^2 2x = 1 - tan 2x .

Solve the following differential equation: tany\ dx+sec^2ytanx\ dy=0

Solve the equation sec x = sec (x+pi)

Solve the equation tan x + sec x = 2 cos x

Solve the following differential equation: e^xtany\ dx+(1-e^x)sec^2y\ dy=0

Solve the following differential equation: e^xtany\ dx+(1-e^x)sec^2y\ dy=0

Solve the following differential equation: 3e^xtany\ dx+(2-e^x)sec^2y\ dy=0, given that when x=0,\ y=pi/4dot