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Trig Formulas
Trig Formulas
6
Mathematics
Undergraduate 1
10/22/2006
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Term
sin(x + y) = ?
 Definition
(sin x)(cos y) + (cos x)(sin y)
Term
sin(x - y) = ?
 Definition
(sin x)(cos y) - (cos x)(sin y)
Term
cos(x + y) = ?
 Definition
(cos x)(cos y) - (sin x)(sin y)
Term
cos(x - y)
 Definition
(cos x)(cos y) + (sin x)(sin y)
Term
tan(x + y)
 Definition
[(tan x) + (tan y)] / 1 - (tan x)(tan y)
Term
tan(x - y) = ?
 Definition
[(tan x) - (tan y)] / 1 + (tan x)(tan y)
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