Cheatography
https://cheatography.com
This is everything worth memorizing, but on paper so that you don't have to remember it.
This is a draft cheat sheet. It is a work in progress and is not finished yet.
Trig Identities
Function(s) |
Alternate form |
tan(x) |
sin(x)/cos(x) |
sec(x) |
1/cos(x) |
csc(x) |
1/sin(x) |
cot(x) |
1/tan(x) |
sin2(x)+cos2(x) |
1 |
tan2(x)+1 |
sec^2 |
cot2+1 |
csc^2 |
sinh(x) |
(1/2)(ex-e-x) |
cosh(x) |
(1/2)(ex+e-x) |
tanh(x) |
sinh(x)/cosh(x) |
sech(x) |
1/cosh(x) |
csch(x) |
1/sinh(x) |
coth(x) |
1/tanh(x) |
cosh2(x)-sinh2(x) |
1 |
1-tanh2(x) |
sech2(x) |
coth2(x)-1 |
csch2(x) |
Identities With π
Function |
Alternate Form |
sin(π/2-x) |
cos(x) |
cos(π/2-x) |
sin(x) |
tan(π/2-x) |
cot(x) |
sec(π/2-x) |
-sec(x) |
csc(π/2-x) |
csc(x) |
cot(π/2-x) |
tan(x) |
sin(π-x) |
sin(x) |
cos(π-x) |
-cos(x) |
tan(π-x) |
-tan(x) |
sec(π-x) |
-sec(x) |
csc(π-x) |
csc(x) |
cot(π-x) |
-cot(x) |
sin(3π/2-x) |
-cos(x) |
cos(3π/2-x) |
-sin(x) |
tan(3π/2-x) |
cot(x) |
sec(3π/2-x) |
-csc(x) |
csc(3π/2-x) |
-sec(x) |
cot(3π/2-x) |
tan(x) |
trg(2π-x) |
trg(-x) |
|
|
Angle Identities
Function |
Alternate Form |
sin(-x) |
-sin(x) |
cos(-x) |
cos(x) |
tan(-x) |
-tan(x) |
sec(-x) |
sec(x) |
csc(-x) |
-csc(x) |
cot(-x) |
-cot(x) |
sin(π/2-x) |
cos(x) |
cos(π/2-x) |
sin(x) |
tan(π/2-x) |
|
sin(π/2-x) |
sin(π/2-x) |
sin(π/2-x) |
|
