Question

Question-
If unit vector A Cap and B cap are inclined at an angle theta then magnitude of A cap minus B cap is:-
a)2(cos theta)
b)2(cos theta/2)
c)2sin (theta/2)
d)2tan (theta/2)
Answer -
magnitude of A cap minus B cap =✓(1)^2+(1)^2 - 2×1×1 ×cos theta
(theta is angle between A cap and B cap)
=✓2-2cos theta
=✓2(1-cos theta)
=✓2×2sin^2(theta/2)
=2 sin(theta/2)​

Answer 1

Answer:

ap ins.ta nhi chalate ho kya