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## Pixar in a Box

### Course: Pixar in a Box > Unit 14

Lesson 2: Mathematics of rotation# Start here!

Overview of this lesson

## Ready to dive into some more math?

In this lesson we are going to derive a powerful formula which will calculate where

*any point*left parenthesis, x, comma, y, right parenthesis goes after*rotation*by an angle theta about the origin.The formulas we'll end up with are:

# What do I need to know before starting?

To derive the rotation formulas we are going to use the basic trig ratios

**sine**and**cosine**. If you don't remember these ratios you can click here to watch a video review.## Want to join the conversation?

- im an 8th grade and this confuses mexD(11 votes)
- I looked at the pictures of the math formulas, and I'm totally feel like I've been overwhelmed. I've gotten this far and now I feel like I'm stuck at an
**IMPOSSIBLE**roadblock. Help!(5 votes)- Hello!

That's ok. Everyone gets stuck at one point in time. Perhaps you should learn Trigonometry, so then you can get a better understanding of things. Here's the link:

https://www.khanacademy.org/math/trigonometry

Hope this helps!

---Inspirable Learner(4 votes)

- Why does this have to be required? I am not interested, but I have to. I mean,it's a learning experience on how to do all that stuff that Pixar does, but unless you're going to be a Pixar person, what do I need this skill for?(4 votes)
- isnt cosine and sine trigonomitry(2 votes)
- Yes they are. They get taught over here in mathematics:

https://www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-trig-ratios-intro/v/basic-trigonometry(4 votes)

- i am in 10,00000000000 grade and i know every thing in this worlds and other worlds(2 votes)
- Okay? What's General Relativity then?(2 votes)

- i think its ok that i am a 5th grader but i still watch your videos and do your activities. its kind of fun andienjoy it.

Thank you so so much for creating this on Khan Academy.

plus i am 10 years old :)(1 vote) - Is a sixth grader going to be able to do this ok?(1 vote)
- I am in 7th grade, I am so confused(1 vote)
- trig confuses me need help as if transformations weren't hard enough(1 vote)