A. (ex+1)cot y=c
B. (ex-1)cot y=c
C. (2ex-1)cot y=c
D. (ex-2)cot y=c
The solution of (x+y+1) dy/dx=1 is
The solution of x cos(y/x)(y dx+x dy)=y sin y/x(x dy – y dx) is
A family of curves has the differential equation (xy)dy/dx = 2y2 - x2. Then the family of curves is
A= sin 780- sin 180+ cos 1320, B= cos 120+ cos 840+ cos 1320+ cos 1560 and C= (sin 750+sin 150)/ (sin 750+cos 150) then by arranging in the ascending order
The solution of extan y dx+(1-ex)sec2ydy=0 is
If the equation λx2 – 5xy + 6y2 + x -3y=0, represents a pair of straight lines, then their point of intersection is
If A and B are two square matrices such that B=A-1 BA, then (A+B)2 is equal to
The solution of y dx-x dy+log x dx=0 is
The solution of (12x+5y-9)dx+(5x+2y-4)dy=0 is
The solution of (x+y+1)dx+(3x+4y+4)dy=0 is