x(1+cos y)dx-sin y(1+sin x)

If y=(cos x-sin x)/(cos x+sin x) then ((d^(2)y)/(dx^(2)))/((dy)/(dx))=

The solution of (dy)/(dx)+(y cos x +sin y+y)/(sin x+x cos y+x)=0 is

7.Show that | [1, cos x-sin x, cos x+sin x], [1, cos y-sin y, cos y+sin y ],[1, cos z-sin z ,cos z+sin z ]|=2| [1 ,cos x, sin x], [1, cos y, sin y ],[1, cos z, sin z] |

If cos (x-y) =-1, then the values of (cos x+ cos y) and (sin x + sin y) are respectively-

If cos (x-y)+1=0, then the value of (cos x+ cos y) and (sin x+sin y) is-

If y = Tan ^(-1) ((cos x- sin x)/(cos x + sin x)) then (d ^(2) y)/(dx ^(2))=

If y = ( sin x)/(1 + ( cos x)/(1 + (sin x)/(1 + cos x . . . . ))) then find ( dy)/( dx)

If y = |{:(sin x , cos x , sin x),(cos x,-sin x, cos x),(x, 1, 1):}| , then (dy)/(dx) is

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

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