The sides of a triangle are in AP. If the angles A and C are the greatest and smallest angle respectively, then `4 (1- cos A) (1-cos C)` is equal to

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

The angles of a triangle are in A.P. The greatest angle is twice the least. Find all the angles

The sides of a triangle are in a ratio of 4:5:6. the smallest angle is

If the sides of a right angled triangle are in A.P then the sines of the acute angles are

If the angle of a triangle are in the ratio 2:1:3, then find the measure of smallest angle.

The angles of a triangle are in the ratio 1:2:3 . What is the sine of the smallest angle?

The internal angles of a triangle are in A.P. . If the smallest angle is 45^(@) , find the remaining angles.

If the lengths of the sides of a triangle are in AP and the greatest angle is double the smallest, then a ratio of lengths of the sides of this triangle is

If the lengths of the sides of a triangle are in AP and the greatest angle is double the smallest, then a ratio of lengths of the sides of this triangle is

If the sides of a triangle are in A.P. and the greatest angle of the triangle exceeds the least by 90^(@) , then sine of the third angle is