MATH: How is the scalar projection negative?

2011-05-13 11:41 pm

So I had two vectors.
A(-1, 2, -5) and B(1, 0, 0).

So I found the scalar projection of A on B, and ended up with -1, and the answer key actually agrees!

How is this possible? I am lost.

更新1:

como what you did was the dot product, I am asking how the scalar is negative.

回答 (3)

[匿名]

2011-05-13 11:44 pm

✔ 最佳答案

range of cos is -1 to +1
so, it depends on its domain (theta), that determines the sign

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[匿名]

2017-02-28 1:11 am

Astral projection is in user-friendly terms a hallucination. you may sense soreness by way of certainty that each and every of the senses (which contain touch) are being fooled in the process a hallucination. a lot of people have faith astral projection is an quite actual experience, yet there's no info of that.

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Como

2011-05-13 11:51 pm

a = - i + 2 j - 5 k
b = i

a • b = ( - i + 2 j - 5 k ) ( i )

a • b = - i ² = - (-1) = 1

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