the sines of two angles of a triangle are equal to `5/13 & 99/101` the cosine of the third angle is

The sines of two angles of a triangle are equal to 5/13 and 99/101 . What is the cosine of the third angle ?

The measures of two angles of a triangle are 72° and 58° . Find the measure of the third angle.

Let p be the product of the sines of the angles of a triangle ABC and q is the product of the cosines of the angles In this triangle tan A+tan B+tan C is equal to

If cosines of two angles of a triangle are proportional to the opposite sides, show that the triangle is isosceles

The measures of two angles of a triangle are 72^(@) and 58^(@) . Find the measure of the third angle.

In DeltaABC , The sines of the angles of a triangle are in the ratio of 4 : 5 : 6, prove that the cosines of the angles are 12 : 9 : 2.

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

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

The sum of two angles of a triangle is equal to its third angle.Determine the measure of the third angle.

The sum of two angles of a triangle is equal to its third angle. Determine the measure of the third angle.