albertthesav

2 Questions
0 Answers

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19

1

+8

Need help: angle between two vectors formula PROOF

If a and b are both vectors, then cos(x) = (a*b)/(|a|*|b|).
I don't understand why this cos(x) equals the right side of the equation. Can somebody explain, or better yet, could somebody prove the formula?

albertthesav Mar 6, 2024

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35

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+8

Urgent triq question

Given and , find

albertthesav Mar 3, 2024