Home
Class 11
MATHS
In DeltaABC prove that a^2+b^2+c^2=2(bc ...

In `DeltaABC` prove that `a^2+b^2+c^2=2(bc cosA+cacosB+abcosC)`

Promotional Banner

Similar Questions

Explore conceptually related problems

In any DeltaABC , prove that : a^2 +b^2 +c^2 = 2 (bc cos A + ca cos B + ab cos C) .

In Delta ABC prove that 2(bc cosA + ca cosB + ab cosC) = a^2 + b^2 + c^2

Prove that a^(2)+b^(2)+c^(2)=2(ab cos C +bc cosA +ca cos B)

In any Delta A B C , prove that: 2(bc cosA+cacosB+a bcosC)=a^2+b^2+c^2

In Delta ABC prove that a(b^2 + c^2) cosA + b(c^2 +a^2)cosB + c(a^2 + b^2) cosC = 3abc

In DeltaABC , prove that: (c-bcosA)/(b-c (cosA))=(cosB)/(cosC)

In any DeltaABC prove by vectors that a^2=b^2+c^2-2 bc cos A.

In any A B C ,2(bc cosA+ ca cosB+ab cosC) =

In DeltaABC ,prove that: a) sin2A + sin2B-sin2C=4cosA cosB sinC

In DeltaABC ,prove that: a) sin2A + sin2B-sin2C=4cosA cosB sinC