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Mathematics 6 Online
OpenStudy (anonymous):

solve

OpenStudy (anonymous):

A, B and C are angels of a triangle and a,b and c sides ?

OpenStudy (anonymous):

\[2(bc \cos A+ca \cos B+ab \cos C)=a^2+b^2+c^2\]

OpenStudy (anonymous):

@msingh plz state your question clearly

OpenStudy (anonymous):

where is the question

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