Math, asked by djaideep227pdrlbh, 1 year ago

a(b^2+c^2)cosA+b(a^2+b^2)cosB+c(a^2+b^2)cosC

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Answered by sonachrislin01

13

here is ur answer ...it is 3abc

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djaideep227pdrlbh: thank you

sonachrislin01: welcome

sonachrislin01: welcome...

djaideep227pdrlbh: what about this Σa^2(cos^2 B-cos^2 C)

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