Question

if vector R = vector P × vector Q, show that vector 4R . (vector 3P + vector 6Q) = 0​

Answer 1

Answer:

DONE.

Explanation:

R = P×Q (R is perpendicular to P and Q )

4R.( 3P+ 6Q) = 4R.3P+ 4R.6Q ( R is perpendicular to P and Q therefore their dot product will be 0 as cos 90 is 0)

hence 4R.3P= 0

4R.6Q= 0

SO, 4R.( 3P+ 6Q) = 4R.3P+ 4R.6Q= 0

HENCE PROVED