Formulas for Exam 2 Flashcards
1
Q
tan0 (quotient)
A
sin0/cos0
2
Q
cot0(quotient)
A
cos0/sin0
3
Q
sin0
A
1/csc0
4
Q
cos0
A
1/sec0
5
Q
tan0 (reciprocal)
A
1/cot0
6
Q
csc0
A
1/sin0
7
Q
sec0
A
1/cos0
8
Q
cot0 (reciprocal)
A
1/tan0
9
Q
s + c Pythagorean theorem?
A
sin02+cos02=1
10
Q
s - t Pythagorean theorem
A
sec20-tan20=1
11
Q
c - c Pythagorean theorem?
A
csc20-cot20=1
12
Q
sin(-0)=
A
-sin0
13
Q
tan(-0)
A
-tan0
14
Q
csc(-0)
A
-csc0
15
Q
cos(-0)=
A
-cos0
16
Q
cot(-0)=
A
-cot0
17
Q
sec(-0)=
A
-sec0
18
Q
sin(pi/2-0)
A
cos0
19
Q
tan(pi/2-0)
A
cot0
20
Q
csc(pi/2-0)
A
sec0
21
Q
cos(pi/2-0)
A
sin0
22
Q
cot(pi/2-0)
A
tan0
23
Q
sec(pi/2-0)
A
csc0
24
Q
sin(20)
A
2sin0cos0
25
cos(20)
cos20 - sin20
2cos20-1
1-2sin20
26
tan(20)
2tan0/1-tan0
27
sin(0+-o)
sin0coso+- cos0sino
28
cos(0+-o)
cos0coso-+ sin0sino
29
tan(0+-o)
tan0+-tano/1+-tan0tano
30
sin20=
1-cos(20)/2
31
cos20=
1+cos(20)/2
32
tan20=
1-cos(20)/1+cos(20)
33
sin0+sino=
2sin[0+o/2]cos[0-o/2]
34
sin0-sino=
2cos[0+o/2]sin[0-o/2]
35
cos0+coso=
2cos[0+o/2]cos[0-o/2]
36
cos0-coso
-2sin[0+o/2]sin[0-o/2]
37
sin0sino=
{cos90-o)-cos(0+o)}/2
38
cos0coso=
{cos(0-o)+cos(0+o)}/2
39
sin0coso=
{sin(0+o)+sin(0-o)}/2
40
cos0sino=
{sin(0+o)-sin(0-o)}/2
41
Sin-1(-1)
-90 or pi/2
