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Use an algebraic method to find the angle between the vectors. Use a calculator to approximate exact answers when appropriate. 21. (8. 5) (-3. 4)

Use an algebraic method to find the angle between the vectors. Use a calculator to approximate exact answers when appropriate.

21. (8. 5) (-3. 4) -4-3-2-1 12 3 4 5 6 7 8 9

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