Math AAHL
Math AIHL
Math AASL
Math AISL
Sign Out
erplex
LoginJoin
IB Math AIHL
/
3: Geometry & Trigonometry
/
Trig equations & identities

Trig equations & identities

erplex

© 2025 Perplex Learning Incorporated. All rights reserved.

All content on this website has been developed independently from and is not endorsed by the International Baccalaureate Organization. International Baccalaureate and IB are registered trademarks owned by the International Baccalaureate Organization.

MembershipTeamContactTerms of ServicePrivacy Policy

Timeline

UNIT CIRCLE

sin and cos on the unit circle

00:51

Key values of sin, cos & tan

03:28

Symmetry about the y-axis

08:11

Quadrants

08:53

Periodicity

10:03

Exercise

12:06

Symmetry about the origin

14:09

Symmetry about the x-axis

14:54

Relating Angles between Quadrants

15:22

Exercise

17:04

tan as slope in the unit circle

20:30

sin²θ+cos²θ=1

22:19

Exercise

25:00

TRIG FUNCTIONS

Sine and Cosine functions

26:44

Sinusoidal Functions

29:08

tan function

31:00

Problem

32:23

TRIG EQUATIONS

Solving sinθ=a

36:36

Solving cosθ=a

38:25

Trigonometric solution domains

39:21

Exercise

43:45

Trigonometric quadratics

46:34

Problem

51:42

IDENTITIES

sin²θ+cos²θ=1

56:16

Sine double angle identity

57:02

Cosine double angle identity

57:40

Problem

59:16

Problem

1:02:02

HL FUNCTIONS

Inverse sine (arcsin) function

1:11:58

Inverse cosine (arccos) function

1:15:14

Inverse tan (arctan) function

1:16:25

Reciprocal trig functions

1:17:13

HL IDENTITIES

1+tan²θ=sec²θ

1:18:22

1+cot²θ=cosec²θ

1:19:40

Problem

1:20:16

Sine and cosine compound angle identities

1:22:59

Tan double angle identity

1:24:11

Problem

1:25:31

Tan compound angle identity

1:31:07

Problem

1:32:19

Problem

1:35:56

Unit circleTrig functionsTrig equationsIdentitiesHL functionsHL Identities

The video will automatically pause when it reaches a problem.

Unit circleTrig functionsTrig equationsIdentitiesHL functionsHL Identities