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Sum And Difference Identities

rename
Updated 2009-01-22 12:28

Sum and Difference Identities

AB
sin(u+v)sin u cos v + cos u sin v
sin(u-v)sin u cos v - cos u sin v
cos(u+v)cos u cos v - sin u sin v
cos(u-v)cos u cos v + sin u sin v
tan(u+v)(tan u + tan v)/(1 - tan u tan v)
tan(u-v)(tan u - tan v)/(1 + tan u tan v)
memorize

 

In the format A=B