Trig Identities
4.5(8)
Studied by 395 people
Learn
Practice Test
Spaced Repetition
Match
FlashcardsCard Sorting
1/39
Earn XP
Description and Tags
Study Analytics
Name | Mastery | Learn | Test | Matching | Spaced |
|---|
No study sessions yet.
40 Terms
1
New cards
cos^2(x)+sin^2(x)=
1
2
New cards
1+tan^2(x)=
sec^2(x)
3
New cards
cot^2(x)+1=
csc^2(x)
4
New cards
tan(x)=
sin(x)/cos(x)
5
New cards
cot(x)=
cos(x)/sin(x)
6
New cards
sin(-x)=
\-sin(x)
7
New cards
cos(-x)=
cos(x)
8
New cards
tan(-x)=
\-tan(x)
9
New cards
csc(-x)=
\-csc(x)
10
New cards
sec(-x)=
sec(x)
11
New cards
cot(-x)=
\-cot(x)
12
New cards
csc(x)=
1/sin(x)
13
New cards
sec(x)=
1/cos(x)
14
New cards
cot(x)=
1/tan(x)
15
New cards
sin(x)=
1/csc(x)
16
New cards
cos(x)=
1/sec(x)
17
New cards
tan(x)=
1/cot(x)
18
New cards
sin(x)=
cos (pi/2-x)
19
New cards
cos(x)=
sin (pi/2-x)
20
New cards
tan(x)=
cot (pi/2-x)
21
New cards
csc(x)=
sec (pi/2-x)
22
New cards
sec(x)=
csc (pi/2-x)
23
New cards
cot(x)=
tan (pi/2-x)
24
New cards
cos(x+-y)=
cos(x)cos(y) +- sin(x)sin(y)
25
New cards
sin(x+-y)=
sin(x)sin(y)+-cos(x)cos(y)
26
New cards
tan(x+-y)=
tan(x)+-tan(y)/1+-tan(x)tan(y)
27
New cards
sin2(x)=
2sin(x)cos(x)
28
New cards
cos2(x)=
cos^2(x)-sin^2(x)
2cos^2(x)-1
1-2sin^2(x)
2cos^2(x)-1
1-2sin^2(x)
29
New cards
tan2(x)=
2tan(x)/1-tan^2(x)
30
New cards
sin^2(x)=
1-cos2(x)/2
31
New cards
cos^2(x)=
1+cos2(x)/2
32
New cards
tan^2(x)=
1-cos2(x)/1+cos2(x)
33
New cards
sin(x/2)=
\+-(1-cos(x)/2)^1/2
34
New cards
cos(x/2)=
\+-(1+cos(x)/2)^1/2
35
New cards
tan (x/2)=
\+-(1-cos(x))^1/2
(1-cos(x)/sin(x))^1/2
sin (x)/1+cos(x)
(1-cos(x)/sin(x))^1/2
sin (x)/1+cos(x)
36
New cards
sinA/a=
sinB/b
sinC/c
sinC/c
37
New cards
Area of a triangle=
1/2 absinC
38
New cards
a^2=
b^2+c^2-2bc cosA
39
New cards
cosA=
b^2+c^2-a^2/2bc
40
New cards
Heron’s Formula Area=
(s(s-a)(s-b)(s-c))^1/2
Note 
Flashcards (34)