Home
Explore
Exams
Search for anything
Login
Get started
Home
Math
Pre-Calculus
Trig Identities
4.5
(8)
Rate it
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Card Sorting
1/39
Earn XP
Description and Tags
Pre-Calculus
11th
Add tags
Study Analytics
All
Learn
Practice Test
Matching
Spaced Repetition
Name
Mastery
Learn
Test
Matching
Spaced
No study sessions yet.
40 Terms
View all (40)
Star these 40
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)
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)
36
New cards
sinA/a=
sinB/b
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