If P,Q and R are the angles of a triangle the value of `|{:(tanP,1,1),(1,tanQ,1),(1,1,tanR):}|` is

If P,Q,R are angles of triangle PQR then the value of |{:(-1, cos R, cosQ),(cosR,-1,cosP),(cosQ, cosP,-1):}| is equal to

What is the value of 1/(tanq+1/tanq)

If a^(-1), b^(-1), c^(-1) are p^(th),q^(th) and r^(th) terms of an AP then the value of |(bc,ca,ab),(p,q,r),(1,1,1)| is

If either of the two P , Q and R are equal and P+Q+R=180^(@) , then the value of |{:(1, 1+sinP,sinP(1+sinP)),(1,1+sinQ,sinQ(1+sinQ)),(1,1+sinR,sinR(1+sinR)):}| is (a) 0 (b) 1 (c) sin(P+Q+R) (d) sinQ.sinR

|(1,1,1),(p,q,r),(p,q,r+1)| is equal to

If G(3, -5, r) is centroid of triangle ABC where A(7, - 8, 1), B(p, q, 5) and C(q + 1, 5p, 0) are vertices of a triangle then values of p, q, r are respectively ...