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Trigonometric Formula
Trigonometric Formula
13
Mathematics
11th Grade
05/12/2010
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Term
sin(a+b)
 Definition
=sin(a)cos(b) + cos(a)sin(b)
Term
sin(a-b)
 Definition
=sin(a)cos(b) - cos(a)sin(b)
Term
cos(a+b)
 Definition
=cos(a)cos(b) - sin(a)sin(b)
Term
cos(a-b)
 Definition
=cos(a)cos(b) + sin(a)sin(b)
Term
tan(a+b)
 Definition
=tan(a)+tan(b) / 1-tan(a)tan(b)
Term
tan(a-b)
 Definition
=tan(a) - tan(b) / 1+tan(a)tan(b)
Term
sin2(a)
 Definition
=2sin(a)cos(a)
Term
cos2(a)
 Definition
=cos^2(a)-sin^2(a)
=1-2sin^2(a)
=2cos^2(a)-1
Term
cos^2(a)-sin^2(a)
 Definition
=1-2sin^2(a)
Term
cos^2(a)-sin^2(a)
 Definition
=2cos^2(a)-1
=1-2sin^2(a)
Term
tan2(a)
 Definition
=2tan(a) / 1-tan^2(a)
Term
sin^2*(a)/2
 Definition
=1-cos(a) /2
Term
cos^2 (a)/2
 Definition
=1 +cos(a) /2
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