If angle C of a triangle ABC be obtuse, then (A) `0 < tan A tan B < 1` (B) `tan A tan B > 1` (C) `tan A tan B=1` (D) none of these

If in a triangle ABC , the angle C is obtuse then tan A *tan B is

In a Delta ABC , if the angle C is obtuse, then tan A ta B =

If triangle ABC , is obtuse angled at C , then

If in a triangle ABC, tanA+tanB+tanC>0 the triangle is (A) acute angled triangle (B) obtuse angled (C) right angled (D) none of these

If A, B and C are angles of a triangle such that angleA is obtuse, then show tan B tan C lt 1.

If A, B and C are angles of a triangle such that angleA is obtuse, then show tan B tan C lt 1.

If A, B and C are angles of a triangle such that angleA is obtuse, then show tan B tan C lt 1.

If A, B and C are angles of a triangle such that angleA is obtuse, then show tan B tan C lt 1.