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

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

Prove that (sin A-sin B)/(cos A+ cos B) = "tan" (A-B)/2

(sin A + sin B) / (cos A + cos B) = tan ((A + B) / (2))

If sin x cos y=(1)/(4) and 3tan x=4tan y then sin(x-y)=

If sin x cos y=(1)/(4) and 3tan x=4tan y then sin(x-y)=

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

Tan ^(-1) ((a cos x -b sin x)/( b cos x + a sin x ))

If tan A=1 and tan B=sqrt(3), evaluate cos A cos B-sin A sin B