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Trig
Additive properties
9
Mathematics
Undergraduate 1
01/11/2008
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Term
sin (u+-v)
 Definition
sin u*cos v +- cos u sin v
Term
cos (u+-v)
 Definition
cos u cos v -+ sin u sin v
Term
tan (u+-v)
 Definition
(tan u +- tan v)/
(1 -+ tan t * tan v)
Term
cos 2u
 Definition
cos^2 u - sin^2 u =
2cos^2u-1 =
1- 2sin^2 u
Term
sin 2u
 Definition
2sin u cos u
Term
tan 2u
 Definition
(2tan u)/
(1- tan^2 u)
Term
sin^2 x + cos^2 x
 Definition
1
Term
1 + tan^2 x
 Definition
sec^2 x
Term
1 + cot^2 x
 Definition
csc^2 x
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