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Trigonometric Formulas
Trig
28
Mathematics
Not Applicable
02/07/2005
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Term
secX
 Definition
1/cosX
Term
cscX
 Definition
1/sinX
Term
cotX
 Definition
1/tanX
Term
sin(-X)
 Definition
-sinX
Term
csc(-X)
 Definition
-cscX
Term
tan(-X)
 Definition
-tanX
Term
cos(-X)
 Definition
cosX
Term
sec(-X)
 Definition
secX
Term
cot(-X)
 Definition
-cotX
Term
sin^2X + cos^2X
 Definition
1
Term
1 + tan^2X
 Definition
sec^2X
Term
1 + cot^2x
 Definition
csc^2x
Term
sinX
 Definition
cos(90-x)
Term
cosX
 Definition
sin(90-x)
Term
tanx
 Definition
cot(90-x)
Term
cotx
 Definition
tan(90-x)
Term
secX
 Definition
csc(90-x)
Term
cscX
 Definition
sec(90-x)
Term
cos(A + B)
 Definition
cosAcosB-sinAsinB
Term
cos(A-B)
 Definition
cosAcosB+sinAsinB
Term
sin(A + B)
 Definition
sinA cosB + cosA sinB
Term
sin(A-B)
 Definition
sinA cosB - cosA sinB
Term
tan(A+B)
 Definition
tanA + tanB
------------
1 - tanAtanB
Term
tan(A-B)
 Definition
tanA - tanB
------------
1+tanAtanB
Term
sin2A
 Definition
2 sinA cosA
Term
cos2A
 Definition
cos^2A - sin^2A = 1-2sin^2A = 2 cos^2A-1
Term
tan2A
 Definition
2 tan A
--------
1 - tan^2A
Term
sin A/2
 Definition
+/- sq. root (1 - cosA /2)
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