All Trig Identities Flashcards
cosec x is the same as
1/sin x
sec x is the same as
1/cos x
tan x is the same as
sin x / cos x
cot x is the same as
cos x / sin x AND/OR 1/tan x
sin^2 x + cos^2 x is the same as
1
1 - sin^2 x is the same as
cos^2 x
1 - cos^2 x is the same as
sin^2 x
tan^2 x + 1 is the same as
sec^2 x
1 + cot^2 x is the same as
cosec^2 x
sin(2x) is the same as
2sinxcosx
cos(2x)
cos^2x - sin^2x
cos(2x)
2cos^2x - 1
cos(2x)
1 - 2sin^2x
tan(2x)
2tanx / 1 - tan^2 x
sin(A+B)
sinAcosB + cosAsinB
sin(A-B)
sinAcosB - cosAsinB
cos(A+B)
cosAcosB - sinAsinB
cos(A-B)
cosAcosB + sinAsinB
tan(A+B)
tanA + tanB / 1 + tanAtanB
tan(A-B)
tanA - tanB / 1 - tanAtanB
What is arctan equal to
tan-1
What is arccos equal to
cos-1
What is arcsin equal to
sin-1
Domain of y = arcsin x
-1 <= x <= 1
Range of y = arcsin x
-90 <= x <= 90
Domain of y = arccos x
-1 <= x <= 1
Range of arccos x
0 <= x <= 180
Domain of y = arctan x
x E R
Range of y = arctan x
-90 <= x <= 90
