Question

Find the inner product and state if perpendicular:
<4,8> dot <6,-3>

Answer 1

a.b = |a||b| cos(angle between them)
or still
<a, b>.<c,d> = ac + bd
now can you solve
if dot product comes out to be zero then they are perpendicular

Answer 2

thank you very much

Answer 3

:)