phy
posted by samson
Given three vectors
a⃗ =−i⃗ −4j⃗ +2k⃗
,
b⃗ =3i⃗ +2j⃗ −2k⃗
,
c⃗ =2i⃗ −3j⃗ +k⃗
, calculate
a⃗ ⋅(b⃗ ×c⃗ )

MathMate
Given
a=<1,4,2>
b=<3,2,2>
c=<2,3,1>
bxc=
i j k
3 22
23 1
=<4,7,13>
so
a.(bxc)
=<1,4,2>.<4,7,13>
=4+2826
=6
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