## ajprincess Group Title Note to the viewers: This is nt a question. I made a mistake in certain portion of my previous post which was a tutorial on trigonometric identities and this is the correct version of it. 2 years ago 2 years ago

1. ajprincess Group Title

jst a moment then.

2. ajprincess Group Title

$sin(A+B)=sinAcosB+cosAsinB$ $cos(A+B)=cosAcosB-sinAsinB$ $sin(A-B)=sinAcosB-cosAsinB$ $cos(A-B)=cosAcosB+sinAsinB$

3. Valpey Group Title

You can also write: $sin(A\pm B)=sinAcosB\pm cosAsinB$ $cos(A\pm B)=cosAcosB\mp sinAsinB$