15 Replies
pretty self explanatory i have no idea how to do this
@Apu
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.Form 2 eqn
One using the fact that magnitude of vector after rotation will be same
Second thru dot product
Angle is given thru which vector is rotated
Find alpha beta and then u can find area using determinant or any other method u like
yoo okok
yo uhm
help here
ye kya kisko kisse equate karna gai
if u know parametric form :
rcos(t)i + rsin(t)j where t is angle it makes with i
the given vector is 2(cos(30)i + sin(30)j)
so to move 45 degree anticlockwise just add 45 to 30 :
2(cos(75)i + sin(75)j)
u will get alpha,beta
from this
1/2 * alpha * beta = area req
so ig 2cos(75) * sin(75) is the ans
or
sin(150)
or sin(30) = 1/2
ahh right
i didnt think of this at al
lemme open it up again
the one real potato gave is also good for other general cases
yeaaa
i get it mujhe costheta se equate karna tha for dot product
idk why i got confused
yeah
yeaa mai bhul gya bilkul uske baare me 💀
got it
thanks yall
@AY ek aur daala hai maine can you check it out rq
bhai complex number se kar lete
Dot product
And magnitudes equate kr skte ho dono vectors ka. Rotation won’t change the magnitude vector.
Bhai complex itna strong nahi hai mera esp not part 2
Wo to kar liya tha
Bas wo click hi nahi hua ki
Cos theta pata hota hai
I'm very tired I'm up since like 5 today
Anyways thankss
+solved @Real potato @AY
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