Answers

2015-05-30T07:31:07+05:30
Its simple
determinant nethod
cross product is given by
a*b=(axi+ayj+azk)*(bxi+byj+bzk0
=i   j   k
ax  ay az
bx  by  bz
we will use i,j,k one by one
when i is chosen its corresponding row and column become bound and remaining elements are subtracted after cross multiplication
so i(aybz-byaz)is component along i
similarly in j,
component is axbz-bxaz
same argument for k also
so
A*B=i(aybz-byaz)-j(axbz-bxaz)+k(axby-bxay)
1 5 1
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