If in a `/_\ABC, a^2cos^2A=b^2+c^2,` then angle A is (A) less than `45^0` (B) more than of `45^0 and less than 90^0` (C) right angled (D) obtuse angle

If in a /_\ABC, sin^2A+sin^2B+sin^2C=2, then /_\ is always a an (A) isosceles triangle (B) right angled triangle (C) acute angled triangle (D) obtuse angled triangle

Obtuse angle an angle whose measure is more than 90^(@) but less than 180^(@) is called an obtuse angle (Fig.11.27) .

In a triangle ABC, the altitude from A is not less than BC andthe altitude from B is not less than AC. The triangle is right angled (b) isosceles obtuse angled (d) equilateral

if 0

The value of int_0^1 e^(x^2)dx is (A) less than e (B) greater than 1 (C) less than e but greater than 1 (D) all of these

An angle which is 50^(@) less than the straight angle is _______.

Acute angle an angle whose measure is greater than 0^(@) but less than 90^(@) is called an acute angle.

The probability an event of a trial is 1 (b) 0 (c) less than 1 (d) more than 1

An angle which measures more than 180^(@) but less than 360^(@) , is called

For a /_\ABC, if cotA.cotB.cotCgt0 , then nature of the triangle is (A) acute angled triangle (B) right angled triangle (C) obtuse angled triangle (D) none of these