In a triangle ABC if `cos A cosB+sinAsinB sinC=1` show that the sides are in the proportion `1:1:sqrt(2)`

If the sides of a triangle are in A.P., and its greatest angle exceeds the least angle by alpha , show that the sides are in the ration 1+x :1:1-x , , where x = sqrt((1- cos alpha)/(7 - cos alpha))

In triangle ABC, cos^2A + cos^2B - cos^2C = 1, then the triangle is necessarily

Prove that in triangle ABC, 2cos A cosB cos Cle(1)/(8) .

If cos A+cos B+2cos C=2, then the sides of triangle ABC are in

In triangle ABC, if cos^(2)A + cos^(2)B - cos^(2) C = 1 , then identify the type of the triangle

In a triangle ABC, 3sinA + 4cosB = 6 and 4sinB + 3cosA = 1. Find the measure of angle C.