सिद्ध करे कि
`tan^(-1)sqrt((xr)/(yz))+tan^(-1)sqrt((yr)/(xz))+ tan^(-1)sqrt((zr)/(xy))=pi`, जबकि `r=x+y+z`.

Prove that : "tan"^(-1)sqrt((xr)/(yz)) +"tan"^(-1) sqrt((yr)/(yx)) +"tan"^(-1) sqrt((zr)/(xy)) = pi "where" r=x +y+z .

If r=x+y+z and tan^(-1)sqrt((xr)/(yz))+"tan"^(-1)sqrt((yr)/(zx))+tan^(-1)sqrt((zr)/(xy))=kpi then the value of k is

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

If x^(2)+y^(2)+z^(2)=r^(2) and x,y,z>0, then tan^(-1)((xy)/(zr))+tan^(-1)((yz)/(xz))+tan^(-1)((zx)/(yr)) is equal to

Evaluate: tan^(- 1)(-1/(sqrt(3)))+tan^(- 1)(-sqrt(3))+tan^(- 1)(sin(-pi/2))

tan^-1 (sqrt(x)+sqrt(a))/(1-sqrt(x)sqrt(a))

tan ^ (- 1) ((sqrt (x (x + y + z))) / (yz)) + tan ^ (- 1) sqrt ((y (x + y + z)) / (xz)) + tan ^ (- 1) (sqrt ((z (x + y + z)) / (xy))) = pi