If `pgtqgt0` and `prlt-1ltqr`, then find the value of `tan^(-1)((p-q)/(1+qr))+tan^(-1)((q-r)/(1+qr))+tan^(-1)((r-p)/(1+qr))`

If pgtqgt0 and prlt-1ltqr , then find the value of tan^(-1)((p-q)/(1+pq))+tan^(-1)((q-r)/(1+qr))+tan^(-1)((r-p)/(1+rp))

If pgtqgt0 and prlt-1ltqr , then find the value of tan^(-1)((p-q)/(1+pq))+tan^(-1)((q-r)/(1+qr))+tan^(-1)((r-p)/(1+rp))

If p>q>0 and pr<-1

If p > q > 0a n dp r < -1 < q r , then find the value of tan^(-1)((p-q)/(1+p q))+tan^(-1)((q-r)/(1+q r))+tan^(-1)((r-p)/(1+r p)) .

If pgtqgt0 and prlt-1ltqr then prove that tan^(-1)((p-q)/(1+pq))+tan^(-1)((q-r)/(1+qr))+tan^(-1)((r-p)/(1+rp))=pi

Prove that cot^(-1)((pq+1)/(p-q))+cot^(-1)((qr+1)/(q-r)) +cot^(-1)((rp+1)/(r-p))=0 .

tan ^(-1)""(1)/(p+q)+tan ^(-1)""(q)/(p^(2)+pq+1)=cot^(-1)p

If p = 3 , q = 2 and r = -1, find the values of (3p^(2)q+5r)/(2pq-3qr)

If p:q=2:3 and q:r=4,:5, then find p:q:r.

show that: cot^(-1) ((pq + 1)/(p - q)) + cot^(-1) ((qr + 1)/(q - r)) + cot^(-1)((rp + 1)/(r - p)) = 0 .