can someone please help me find the magnitude of the vector v(t) = <-7sin^2(t), Sqrt(3)cos(t), -2sin(t)>
\[|v| = \sqrt{x^2 +y^2 +z^2}\]
Lemme show you what I have (; The solution was throwing me off.
mag v = sqrt( 49sin^2(t) + 3cos^2(t) + 4sin^2(t) )
so sqrt ( 53sin^2(t) + 3cos^2(t) )
shouldn't be 49sin^4
Im sorry that should have been v(t) = <-7sin(t) , sqrt(3) cos t , -2sin(t)>
oh well then you are correct :)
the solution somehow has sqrt( 53 sin^2(t) + 3)
So I think I am missing something somewhere );
they sub "1 - sin^2" for cos^2
hmmm wouldnt that make it 50sin^2(t) + 3?
Im gonna try to post a photo to make sure I didnt mess this one up lol.....my friend in the same class is coming to the same problem though.
Sorry battteries dead lol.
yes answer should be sqrt(50sin^2 + 3)
thank you (;
What do you do during the day? Teacher? Engineer?
private math tutor part time .... delivery driver full time
not quite smart enough to be engineer tried teaching, not my fit .... do better in one-on one setting
math degree then?
yeah with emphasis on computational math (i sucked at high level math proofs)
Well I really appreciate your help (;
yw
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