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cosa/a+cosb/b+cosc/c=a 2 +b 2 +c 2 /2abc

cosa/a+cosb/b+cosc/c=a2+b2+c2/2abc

Grade:11

1 Answers

Lab Bhattacharjee
121 Points
8 years ago
cos A=(b^2+c^2-a^2)/2bc  right?

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