Does anyone have a good website that shows the proofs for these equations?
sin(u+v) = sin(u)cos(v) + sin(v)cos(u)
cos(u+v) = cos(u)cos(v) + sin(v)sin(u)
Thanks!
http://www.youtube.com/watch?v=zw0waJCEc-w
http://www.youtube.com/watch?v=V3-xCPDzQ1Q
Yes, there are many websites where you can find proofs for these trigonometric equations. One reliable website that provides detailed explanations and proofs is MathWorld, which is hosted by Wolfram Research. To find the proofs for the equations you mentioned, follow these steps:
1. Open your web browser and go to www.mathworld.wolfram.com.
2. In the search bar, type in "sum of angles trigonometric identities" or "trigonometric identities proofs."
3. Look for results that explain the sum of angles identities, specifically the equations you mentioned:
- sin(u+v) = sin(u)cos(v) + sin(v)cos(u)
- cos(u+v) = cos(u)cos(v) - sin(v)sin(u)
4. Click on the link that provides proofs or detailed explanations for these equations.
5. Read through the webpage to understand the derivations and proofs for the equations.
MathWorld is a reputable source for mathematical information and proofs, so you can rely on the explanations you find there.