`(cosA)/a+(cosB)/b+(cosC)/c= (a^2+b^2+c^2)/(2abc)`

Which of the following holds goods for any tiangle ABC, a,b,c are the lengths of the sides R is circumradius (A) (cosA)/a+(cosB)/b+(cosC)/c= (a^2+b^2+c^2)/(2abc) (B) (sinA)/a+(sinB)/b+(sinC)/c=3/(2R0 (C) (cosA)/a=(cosB)/b=(cosC)/c (D) (sin2A)/a62=(sin2B)/b^2=(sin2C)/c^2

If an a triangle A B C ,(2cosA)/a+(cosB)/b+(2cosC)/c=a/(b c)+b/(a c), find the /_A= 90^0 (b) 60^0 (c) 30^0 (d) none of these

In Delta ABC If: 2(cosA)/a + (cos B)/(b) + 2(cosC)/(c) = a/(bc) + b/(ca) , then: /_A =

If in a triangle ABC , 2(cosA)/a+(cosB)/b+2(cosC)/c=a/(bc)+b/(ca) , then the value of the angle A, is

If in a DeltaABC, 2(cosA)/(a)+(cosB)/(b)+(2cosC)/(c)=(a)/(bc)+(b)/(ca) Then, the value of the angleA is ...... Degree

If in DeltaABC,(2cosA)/(a)+(cosB)/(b)+(2cosC)/(c)=(a)/(bc)+(b)/(ca) , then angleA is equal to

If in a triangle A B C ,(1+cosA)/a+(1+cosB)/b+(1_(cosC))/c =(k^2(1+cosA)(1+cosB)(1+cosC)/(a b c) , then k is equal to 1/(2sqrt(2)R) (b) 2R (c) 1/R (d) none of these

In DeltaABC,(cosA)/(a)=(cosB)/(b)=(cosC)/(c) . If a=(1)/(sqrt(6)) , then the area of the triangle (in sq unit )is

If in DeltaABC,(cosA)/(a)=(cosB)/(b)=(cosC)/(c) and side a=2, then the area of the triangle is