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Sum And Difference Identities

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Sum and Difference Identities

A (memorize) B (memorize)
sin(u+v) sin u cos v + cos u sin v
sin(u-v) sin u cos v - sin u cos 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)

 

In the format A=B

 

 

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