`triangleABC` में सिद्ध कीजिए कि
`acos(A +B +C) -bcos(B+A) -c cos(A+C) = 0`

a.cos A + b.cos B + c.cos C = 2a sin B sin C

In any DeltaABC , prove that acos(A+B+C)-bcos(B+A)-c""cos(A+C)=0

With usual notations, in triangle A B C ,acos(B-C)+bcos(C-A)+c"cos"(A-B) is equal to(a) (a b c)/R^2 (b) (a b c)/(4R^2) (c) (4a b c)/(R^2) (d) (a b c)/(2R^2)

With usual notations, in triangle A B C ,acos(B-C)+bcos(C-A)+c"cos"(A-B) is equal to(a) (a b c)/R^2 (b) (a b c)/(4R^2) (c) (4a b c)/(R^2) (d) (a b c)/(2R^2)

With usual notations, in triangle A B C ,acos(B-C)+bcos(C-A)+c"cos"(A-B) is equal to(a) (a b c)/R^2 (b) (a b c)/(4R^2) (c) (4a b c)/(R^2) (d) (a b c)/(2R^2)

In a triangleABC, " prove that "(sin B)/(sin C)=(c-a cos B)/(b-a cos C)

Prove that in triangleABC, a^3cos(B-C)+b^3cos(C-A)+c^3cos(A-B)=3abc

With usual notations,in a triangle ABC,acos(B-C)+b cos(C-A)+c cos(A-B) is equal to

सिद्ध कीजिए कि 2tan^(-1)sqrt((b)/(a))=cos^(-1)((a-b)/(a+b))

In any triangle ABC, prove that sin^3Acos(B-C)+sin^3Bcos(C-A)+sin^3Ccos(A-B) = 3sinAsinBsinC