Traditional Culture Encyclopedia - Photography and portraiture - Let the plane vector p = (-2,2) and q=( 1, 3), then the number of positive images of P in the q direction is-① Answer ② process.
Let the plane vector p = (-2,2) and q=( 1, 3), then the number of positive images of P in the q direction is-① Answer ② process.
The orthogonal projection number of p in q direction is ∣ p ∣ cos.
= (p？ Q) /∣q∣ (p? q = ∣p∣∣q∣cos<； p，q & gt)
= [(-2, 2) ? ( 1, 3)] / [√( 1? + 3? )]
= (-2* 1 + 2*3) / √ 10
= 2√ 10 / 5
- Related articles
- How to set the background blur of vivo mobile phone?
- I saw the feelings of human beings causing ecological disasters.
- New customs, especially in marriage.
- The three best states of life: unexpected encounter, self-evident, and healing without medicine
- Gogoing (by chance)
- Rain playground, thank you for taking my picture. Is a SLR with a photographer really different? Unprofessional people shoot so well.
- Which water park in Shenzhen is more fun?
- What photographic equipment do I need to prepare to shoot wild animals in Kenya?
- What is Apple's operating system?
- What's the impact of false photo reports?