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trigonometry
formulas
17
Mathematics
11th Grade
03/17/2009
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Term
sin^2 A + cos^2 A =
 Definition
1
Term
tan^2 A + 1 =
 Definition
sec^2 A
Term
cot^2 A + 1 =
 Definition
csc^2 A
Term
tan A =
 Definition
sin A / cos A
Term
cot A =
 Definition
cos A / sin A
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
tan (A+B) =
 Definition
tan A + tan B / 1 + tan A tan B
Term
sin 2A =
 Definition
2 sin A cos A
Term
cos 2A (1)
 Definition
cos^2 A - sin^2 A
Term
cos 2A (2)
 Definition
2cos^2 A - 1
Term
cos 2A (3)
 Definition
1 - 2 sin^2 A
Term
tan 2A =
 Definition
2tan A / 1 - tan^2 A
Term
K =
 Definition
1/2 a b sin C
Term
sin law
 Definition
a^2 = b^2 + c^2 - 2ab cos C
Term
sin law
 Definition
a/sinA = b/sinB = c/sinC
Term
circle segment formula
 Definition
S = r (O)
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