1
Q
1 + cot2x =
A
csc2x
1
Q
sin2x + cos2x =
A
1
2
Q
csc2x - 1=
A
cot2x
3
Q
tan2x + 1=
A
sec2x
4
Q
sec2x - 1=
A
tan2x
5
Q
tan x =
A
sinx/cosx
6
Q
cot x =
A
cosx/sinx
7
Q
sin x =
A
1/cscx
8
Q
cos x =
A
1/secx
9
Q
tan x =
A
1/cotx
10
Q
csc x =
A
1/sinx
11
Q
sec x =
A
1/cosx
12
Q
cot x =
A
1/tanx
13
Q
1 - sin2x =
A
cos2x
14
Q
1 - cos2x =
A
sin2x
15
Q
1 + tan2x =
A
sec2x
16
Q
1 + cot2x =
A
csc2x
17
Q
sin2x =
A
2sinx(cosx)
18
Q
cos2x =
A
cos2x - sin2x , 2 cos2x - 1 , 1 - 2sin2x
Pre-Calc
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