Sum and Difference Identities Flashcards
0
Q
cos(a-b)
A
cos(a)cos(b)+sin(a)sin(b)
1
Q
cos(a+b)
A
cos(a)cos(b)-sin(a)sin(b)
2
Q
sin(a+b)
A
sin(a)cos(b)+cos(a)sin(b)
3
Q
sin(a-b)
A
sin(a)cos(b)-cos(a)sin(b)
4
Q
tan(a+b)
A
(tan(a)+tan(b))/(1-tan(a)tan(b))
5
Q
tan(a-b)
A
(tan(a)-tan(b))/(1+tan(a)tan(b))