If `0ltx, yltpi` and `Cosx + Cosy -Cos(x+y)=3/2` . Find `Sinx + Cosy`

The solution of the DE cos x (1 + cosy )dx - sin y (1+ sin x ) dy=0 is

If cosx.cosy + sinx.siny = -1 then cosx + cosy is

Solve for x and y if sqrt(sinx cosy)=0 and 2sin^(2)x - cos2y-2=0

Evaluate : ( Cos^3x - Sin^3x ) / ( Cosx - Sinx )

If 1 + cos x cos y + sin x sin y = 0 , then which of the following is / are true 1. cosx + cosy = 0 2. sinx + siny = 0 3. sinx + cosy = 0 chose the correct option from the code given below

What is the value of [(sin x + sin y)(sin x - sin y)]//[(cosx + cosy)(cosy- cosx)] ? [(sin x + sin y)(sin x - sin y)]//[(cosx + cosy)(cosy- cosx)] का मान क्या है?