Question

vector p=6i+4√2j+4√2k makes an angle with Z axis equal to
a)cos^-1[√2/5]
b) cos^-1(2√2)
c) cos^-1[2√2)5]
d) cos^-1[2/3]​

Answer 1

Answer:

ans is cos^ -1( 2√2/5) means ans c

apply cos x = a.b / (mod a * mod b)