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Vector m= 1 angle vector n Vector m equals three quarters of pie chart vector m times vector n equals-1 find vector n.
Analysis:

Because mn=|n||m|cos3π/4

That is |n|=mn÷|m|cos3π/4.

=- 1÷(√2×-√2/2)

=- 1÷- 1

= 1

Because the angle between vector n and vector m is 3π of 4.

So n=(- 1, 0)

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