suppose v = - w and u dot v = 0
or u = < 1 , 0 > and v = < cos Θ , sin Θ > and w = < cos Θ , - 10 sin Θ >
If you are talking about dot products of vectors, then I suggest you look for a counterexample. Think geometrically.
It is a conditional rule.
Rule is not true when u = 0.
e.g. 0*5 = 0*7 but 5 â 7
uv = vw
divide by u on both sides
v = w
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suppose v = - w and u dot v = 0
or u = < 1 , 0 > and v = < cos Θ , sin Θ > and w = < cos Θ , - 10 sin Θ >
If you are talking about dot products of vectors, then I suggest you look for a counterexample. Think geometrically.
It is a conditional rule.
Rule is not true when u = 0.
e.g. 0*5 = 0*7 but 5 â 7
uv = vw
divide by u on both sides
v = w