Two vector of 3 or 4 give a resultant of magnitude 5. what is the dot product of the two vector?
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as r=√a²+b²+2abcosФ
a=3,b=4,r=5
this means 2abcosФ=0
so cosФ=0
now
dot product
=a.b.cosФ
=0 ans
make it brainalist
a=3,b=4,r=5
this means 2abcosФ=0
so cosФ=0
now
dot product
=a.b.cosФ
=0 ans
make it brainalist
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