and 
are unit
vectors along X- and Y-axis respectively, then what is the magnitude and direction
of 
and 
?
(b) Find the components of 
along
the directions of vectors and .
Answer:
(a) In Fig. 4.107,
Fig. 4.107
Applying A law of vector
addition in 
Direction of 
is given
by
.
Again, 
Direction of 
is given
by
.
(b) Given 
and let 
and 
. Then
component of 
in the
direction 
Component of in the
direction of 
.
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