Trigonometry Identities

0.0(0)
Studied by 0 people
call kaiCall Kai
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
GameKnowt Play
Card Sorting

1/41

encourage image

There's no tags or description

Looks like no tags are added yet.

Last updated 2:42 AM on 6/16/26
Name
Mastery
Learn
Test
Matching
Spaced
Call with Kai

No analytics yet

Send a link to your students to track their progress

42 Terms

1
New cards

Sum/Difference Identity

sin(a+b)=

Sum/Difference Identity

(sin a)(cos b) + (sin b)(cos a)

2
New cards

Quotient Identity

tan θ=

Quotient Identity

<p>Quotient Identity</p>
3
New cards

Co-Function Identity

sec (π/2-x)=

Co-Function Identity

csc x

4
New cards

Reciprocal Identity

sin θ=

Reciprocal Identity

<p>Reciprocal Identity</p>
5
New cards

Reciprocal Identity

cos θ=

Reciprocal Identity

<p>Reciprocal Identity</p>
6
New cards

Reciprocal Identity

tan θ=

Reciprocal Identity

<p>Reciprocal Identity</p>
7
New cards

Reciprocal Identity

csc θ=

Reciprocal Identity

<p>Reciprocal Identity</p>
8
New cards

Reciprocal Identity

sec θ=

Reciprocal Identity

<p>Reciprocal Identity</p>
9
New cards

Reciprocal Identity

cot θ=

Reciprocal Identity

<p>Reciprocal Identity</p>
10
New cards

Pythagorean Identity (sin/cos)

1=

Pythagorean Identity

<p>Pythagorean Identity</p>
11
New cards

Pythagorean Identity

cos² θ=

Pythagorean Identity

<p>Pythagorean Identity</p>
12
New cards

Pythagorean Identity

sin² θ=

Pythagorean Identity

<p>Pythagorean Identity</p>
13
New cards

Pythagorean Identity

1 + tan² θ

Pythagorean Identity

<p>Pythagorean Identity</p>
14
New cards

Pythagorean Identity

cot² θ + 1=

Pythagorean Identity

<p>Pythagorean Identity</p>
15
New cards

Quotient Identity

cot θ=

Quotient Identity

<p>Quotient Identity</p>
16
New cards

Pythagorean Identity

tan² θ=

Pythagorean Identity

sec² θ - 1

17
New cards

Pythagorean Identity (sec/tan)

1=

Pythagorean Identity

sec² θ - tan² θ

18
New cards

Pythagorean Identity

cot² θ=

Pythagorean Identity

csc² θ - 1

19
New cards

Pythagorean Identity (csc/cot)

1=

Pythagorean Identity

csc² θ - cot² θ

20
New cards

Even/Odd Identity

sin(-x)=

Even/Odd Identity

-sin x

21
New cards

Even/Odd Identity

cos(-x)=

Even/Odd Identity

cos x

22
New cards

Even/Odd Identity

tan(-x)=

Even/Odd Identity

-tan x

23
New cards

Even/Odd Identity

csc(-x)=

Even/Odd Identity

-csc x

24
New cards

Even/Odd Identity

sec(-x)=

Even/Odd Identity

sec x

25
New cards

Even/Odd Identity

cot(-x)=

Even/Odd Identity

-cot x

26
New cards

Co-Function Identity

cos (π/2-x)=

Co-Function Identity

sin x

27
New cards

Co-Function Identity

sin (π/2-x)=

Co-Function Identity

cos x

28
New cards

Co-Function Identity

tan (π/2-x)=

Co-Function Identity

cot x

29
New cards

Co-Function Identity

cot (π/2-x)=

Co-Function Identity

tan x

30
New cards

Co-Function Identity

csc (π/2-x)=

Co-Function Identity

sec x

31
New cards

Sum/Difference Identity

sin(a-b)=

Sum/Difference Identity

(sin a)(cos b) - (sin b)(cos a)

32
New cards

Sum/Difference Identity

cos(a+b)=

Sum/Difference Identity

(cos a)(cos b) - (sin a)(sin b)

33
New cards

Sum/Difference Identity

cos(a-b)=

Sum/Difference Identity

(cos a)(cos b) + (sin a)(sin b)

34
New cards

Sum/Difference Identity

tan(a+b)=

Sum/Difference Identity

<p>Sum/Difference Identity</p>
35
New cards

Sum/Difference Identity

tan(a-b)=

Sum/Difference Identity

<p>Sum/Difference Identity</p>
36
New cards

Double Angle Identity

sin(2θ)=

Double Angle Identity

2 sin a cos a

<p>Double Angle Identity</p><p>2 sin a cos a</p>
37
New cards

Double Angle Identity

tan(2θ)=

Double Angle Identity

<p>Double Angle Identity</p>
38
New cards

Double Angle Identity

cos(2θ)=

Double Angle Identity

<p>Double Angle Identity</p>
39
New cards

Half Angle Identity

sin(θ/2)=

Half Angle Identity

<p>Half Angle Identity</p>
40
New cards

Half Angle Identity

cos(θ/2)=

Half Angle Identity

<p>Half Angle Identity</p>
41
New cards

Half Angle Identity

tan(θ/2)=

Half Angle Identity

1-cos(x)/sin(x) OR sin(x)/1+cos(x) OR

<p>Half Angle Identity</p><p>1-cos(x)/sin(x) OR sin(x)/1+cos(x) OR</p>
42
New cards

Still learning (3)

You've started learning these terms. Keep it up!