vector doubt
is question mei cosine formula lagake |c| ki value alag aa rhi hai, ye approach galat hai kya?
if yes, then how?
9 Replies
@Apu
Note for OP
+solved @user to close the thread when your doubt is solved. Mention the user who helped you solve the doubt. This will be added to their stats.Bud I think you forgot a -ve sign
The cosine rule is for the angle inside..
While the angle between b and c is the exterior angle
So cos of that angle would be -ve of cosP
Vaise mera D aa rha hai
Cause side C= side B
So isosceles triangle banega..
So cos R can be found by cosine law or any other way{I used geometry}
CosR=√3/2
So A.B.CosR,
Would be -72 when calculated
@choco all g?
,rotate
+fsolved
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