If `tan A=(x sin B)/(1-cos B)tan B=(y sin A)/(1-y cos A)` then `(x)/(y)=`

If quad tan A=(x sin B)/(1-x cos B) and tan B=(y sin A)/(1-y cos A) then (sin A)/(sin B)=

If tan theta=(x sin phi)/(1-x cos phi) and tan phi=(y sin theta)/(1-y cos theta) then the value of (x)/(y) is

If tan A=(1-cos B)/(sin B), then tan2A=tan B

tan y = (sin x + 1-cos x) / (sin x-1 + cos x)

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

If x=cos(A+B)cos(A-B) and y=sin (A+B)sin (A-B) then x-y=

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

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

If (x)/(y)=(cos A)/(cos B) where A!=B ,then (a) tan(A+B)/(2)=(x tan A+y tan B)/(x+y) (b) tan(A-B)/(2)=(x tan A-y tan B)/(x+y) (c) (sin(A+B))/(sin(A-B))=(y sin A+x sin B)/(y sin A-x sin B) (d) (x cos B-y cos A)/(xcosB+ ycosA)=0