and
is one half of
the magnitude of 
.
Answer:
Area of a triangle. Suppose two vectors 
and 
are represented
by the sides OP and OQ of 
as
shown in Fig. 7.97.
Fig. 7.97
Let 
. Draw 
. The magnitude
of the vector product 
is
Area of 
Hence the area of the triangle contained
between the vectors and is one half of
the magnitude of .
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