# Trig Formulae

cos^2x + sin^2x = ....
1
1 of 27
tanx = ...
sinx/cosx
2 of 27
1 + tan^2x = ...
sec^2x
3 of 27
cot^2x +1 = ...
cosec^2x
4 of 27
Sin(A+B) = ...
sinAcosB + cosAsinB
5 of 27
Sin(A-B) = ...
sinAcosB - cosAsinB
6 of 27
Cos(A+B) = ...
cosAcosB - sinAsinB
7 of 27
Cos(A-B) = ...
cosAcosB + sinAsinB
8 of 27
Tan(A+B) = ...
tanA + tanB/1 - tanAtanB
9 of 27
Tan(A-B) = ...
tanA -tanB/1 + tanAtanB
10 of 27
cosecx = ...
1/sinx
11 of 27
secx = ...
1/cosx
12 of 27
cotx = ...
1/tanx
13 of 27
sin2A = ...
2sinAcosA
14 of 27
cos2A = ...
cos^2A -sin^2A OR 2cos^2A -1 OR 1-2sin^2A
15 of 27
tan2A = ...
2tanA/1-tan^2A
16 of 27
sin30 = ...
1/2
17 of 27
sin60 = ...
root 3/2
18 of 27
sin45 = ...
1/root 2
19 of 27
cos30 = ...
root 3/2
20 of 27
cos60 = ...
1/2
21 of 27
cos45 = ...
1/root 2
22 of 27
tan30 = ...
1/root 3
23 of 27
tan60 = ...
root 3
24 of 27
tan45 = ...
1
25 of 27
rsin(x + a) = ...
r(sinxcosa + sinacosx) --> asinx + bcsox = rsin(x + a)
26 of 27
rcos(x + a) = ....
r(cosxcosa + sinxsina) --> asinx + bcosx = rcos(x + a)
27 of 27

tanx = ...

sinx/cosx

1 + tan^2x = ...

cot^2x +1 = ...

Sin(A+B) = ...