यदि , tan A = x tan Bतो सिद्ध कीजिए कि -
` ( x+1) sin (A-B) = (x-1) sin (A+B)`

lim_ (x rarr0) (sin (tan x) -tan (sin x)) / (tan ^ (- 1) (sin ^ (- 1) x) -sin ^ (- 1) (tan ^ (- 1) x )) =

सिद्ध कीजिए कि 2tan^(-1)sqrt((b)/(a))=cos^(-1)((a-b)/(a+b))

If tan A= xtanB then prove that sin(A-B)/sin(A+B)=(x-1)/(x+1)

Prove that: If tan A=x tan B, prove that (sin(A-B))/(sin(A+B))=(x-1)/(x+1)

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

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

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

(b) tan^(-1)((1-cos x)/(sin x))