Calculus 3: Vector Calculus in 3-D (21of 35) Magnitude of the Cross Product of 2 Vectors

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In this video I find the magnitude=? of the cross product of vectors AxB=? given A=3i-2j-5k and B=i+4j-4k using 2 method. Method 1: |AxB|=|C|=ABsin(theta)=?, Method 2: using matrices.

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why did it change from sin to cos? And Vice Versa?

Decidiovs_OG
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Sir why did you change it from sin -cos

agharenovweavwerosuo
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Sir I have a vector product given the problem is my answer using the vector product is in negative but using the magnitude equation which is ABsintheta is positive but still they ended up the same answer, they only differ in sign. Is it possible sir or the way I solve was wrong

cyrusdotillos
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Sir please give the Proof of cross product formula

divyamtyagi
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Hi teacher If I get a result close to the other, is it correct or is there something to correct? Greetings.

hectorlml
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