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Trigonometric Formulas
Addition and Subtraction Formulas, Double-Angle Formulas, Formulas for Reducing Powers, Half-Angle Formulas, Product to Sum Identities
21
Mathematics
10th Grade
01/27/2011

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Cards

Term
cos (u/2)
Definition
±sqrt (1+cosu)/2
Term
cos 2x
Definition
2cos^2x-1
Term
cos(x+y)
Definition
cosx cosy - sinx siny
Term
cos(x-y)
Definition
cosx cosy + sinx siny
Term
cos2x
Definition
cos^2x-sin^2x
Term
cos2x
Definition
1-2 sin^2x
Term
cos^2x
Definition
(1+cos2x)/2
Term
cosu cosv
Definition
1/2[cos(u+v)+cos(u-v)]
Term
cosu sinv
Definition
1/2[sin(u+v)-sin(u-v)]
Term
sin(u/2)
Definition
± sqrt (1-cosu)/2
Term
sin(x+y)
Definition
sinx cosy + cosx siny
Term
sin(x-y)
Definition
sinx cosy - cosx siny
Term
sin2x
Definition
2 sinx cosx
Term
sin^2x
Definition
(1-cos2x)/2
Term
sinu cosv
Definition
1/2[sin(u+v)+sin(u-v)]
Term
sinu sinv
Definition
1/2[cos(u-v)-cos(u+v)]
Term
tan(u/2)
Definition
sinu/1+cosu
Term
tan(x+y)
Definition
(tanx + tany)/(1-tanx tany)
Term
tan(x-y)
Definition
(tanx - tany)/(1+tanx tany)
Term
tan2x
Definition
2tanx/(1-tan^2x)
Term
tan^2x
Definition
(1-cos2x)/(1+cos2x)
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