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

Lesson 2: Mathematics of rotation

# 1. How do we rotate points?

First, let's think about how to rotate some really simple points such as (0,0) and (1,0). We use sine and cosine formulas to figure out where things end up after we spin them. Click here to review basic trig ratios..

## Want to join the conversation?

• Can someone explain this to me? I don't understand the exercise after this video. PLEASE!!!
• Well, this involves Trigonometry, so if you're not at that level yet (I'm not, so I barely understand myself) it might not make sense.
• I have a question. If a banana is red is it rotten?
• do we have to do this for h .w
• Wouldn't quaternions be applicable (and faster) here?
• god help me
• Why does a positive rotation mean the object rotates counter-clockwise? Every software I've ever seen uses positive values for clockwise rotation.