PROOF of Compound Angle Identities | jensenmath.ca

[@roongshithamin8694]

Thanks a lot. This video is so underrated.

[@Chewy427]

cos(-y)=cos(y) because cos is symmetric about the vertical axis
and -sin(-x)=sin(x) because sin is symmetric about the origin(rotate the graph)

[@subthermosphere]

holy intuitive explanation great video

[@youremyaddiction3801]

the only genius tht has solved it so fking smoothly 🔥🔥🔥🔥

[@EgemenYalın-z6e]

100 likes? Its should be 100k

[@thegrmah5531]

Thank you so much. You explained it very well.

[@henrytang2203]

I like how compact this proof is.

[@RaffaelloLorenzusSayde]

I'm so lost lol 😅 but thanks 👍

[@lwh7301]

It was good until the diagram kept disappearing.