1
Q
sin
A
y
1
Q
cos
A
x
2
Q
tan
A
y/x
3
Q
sec
A
1/x
4
Q
csc
A
1/y
5
Q
coordinates 0
A
(1,0)
6
Q
cot
A
x/y
7
Q
coordinates pi/6
A
(√ 3/2, 1/2)
8
Q
coordinates pi/4
A
(√ 2/2, √ 2/2)
9
Q
coordinates pi/3
A
(1/2, √ 3/2)
10
Q
coordinates pi/2
A
(0,1)
11
Q
reciprocal identities: sec
A
1/cos
12
Q
reciprocal identities: cos
A
1/sec
13
Q
reciprocal identities: csc
A
1/sin
14
Q
reciprocal identities: sin
A
1/csc
15
Q
reciprocal identities: tan
A
1/cot
16
Q
reciprocal identities: cot
A
1/tan
17
Q
quotient identities: tan
A
sin/cos
18
Q
quotient identities: cot
A
cos/sin
19
Q
even identities:
A
cos0= cos(-0), sec0= sec(-0)
20
Q
odd identities:
A
-sin0= sin(-0), -csc0= csc(-0),
-tan0= tan(-0), -cot0= cot(-0),
21
Q
pythagorean identity og:
A
sin^2 + cos^2 = 1
22
Q
pythagorean identity/sin:
A
1 + tan^2 = sec^2
23
Q
pythagorean identity/cos:
A
cot^2 + 1 = csc^2
24
periodic identities:
cos/sec/sin/csc = (0 + 2pin)
25
triangle sin
opp/hyp
26
triangle cos
adj/hyp
27
triangle tan
opp/adj
precalc trig
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