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Zainab, Formula has - Sign instead of + So make her understand why we used +Using cosine rule: c^2 = a^2 + b^2 +2abcosC
c^2 = 10^2 + 10^2 +2(100)cos 120
C = 10 N
What are you guys talking about
?
ikr... it cn never have '+' sign....the law of cosine is a square + b square -2ab cos angle c = c square
the law of cosine is a square + b square -2ab cos angle c = c square
that's how my teacher thought me
then wat is it??
This is how i solved it and explained to you. Maybe the diagram will help
then it means that the resultant force is already given in the diagram...
if they had given different values then the resultant force would be different and not the same as the forces given in the diagram
m still confused... btw thnks to all
i got it now... the forces to the right is +ve and the forces to the left is -ve...
Bingo!
try to clear ur concepts instead of mkng smthng by ur ownBingo!
try to clear ur concepts instead of mkng smthng by ur own
ok
yes... i told u ths just to make the whole cncpt clear to all of us...
y u deleted that maths question??
I posted in math doubt, I forgot it is phy doubt thread.
oh ryt
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