In `triangle ABC , angle C ` is the greatest angle , then

The angles of a triangle are in A.P. and the greatest angle of the triangle is double the least angle, find the greatest angle in radians.

In triangle ABC , if angle A = 3 angle B and angle C = 2 angle B . Find all the three angles of triangle ABC .

In Delta ABC, if a,b,c are in A.P the greatest angle is A and least is C then 4(1-cos A)(1- cos C) =

In a tringle the measure of the greatest angle is square of measure of the smallest angle and the other angle is double of the smaller angle. Find the greatest angle of the triangle.

If, in Delta ABC, angle C is obstuse, then