in a trangle ABC prove that (b+c) cosA+(c+a) cos B +(a+b) cos c=a+b+c
Answers
Answered by
0
Step-by-step explanation:
gïr.ls jø-īñ få.st
mëêt : kwt-zxxq-csd
zøøm: 7175005304 ; p : 1234
Similar questions