Courselo

Home
Learn
Practice(sign in to use)
Mock exams
Review(sign in to use)

Plan(sign in to use)
Progress(sign in to use)
Tutor(sign in to use)
Studio(sign in to use)

Your plan

Save your progressA free account keeps your answers, predicts your score and builds a daily plan.Create a free account

Loading lesson

Loading your exam home

Home
Learn
Practice, sign in to use
Mocks
Review, sign in to use

Loading lesson

Trigonometric functions and the unit circle · ACT · Courselo

Courselo

ACT
Learn
Math: functions

Trigonometric functions and the unit circle

Math: functions · Lesson 4 of 4

Lesson 4 of 4

Ask a tutor

Unit 6

Math: functions

4 lessons · 5 h 50 min of study

Function notation, domain, composition and sequences1 h 20 min of study
Graphs of functions and transformations1 h 30 min of study
Exponential and logarithmic functions1 h 30 min of study
Trigonometric functions and the unit circleReading · 0%

This unit is ≈6% of the ACT, across 4 lessons. Full syllabus

Lesson 4 of 4 · Math: functions

Trigonometric functions and the unit circle

3 quick checks≈1% of the testStretch: Stretch: harder material that separates the top grades

Reading is free. Sign in to tick off lessons, keep your place and track your mastery.

By the end you’ll be able to

Convert between degrees and radians, and use the unit circle and reference angles to evaluate trigonometric functions, including signs by quadrant
Determine the amplitude, period, midline and phase shift of sine and cosine graphs from equations and graphs
Apply basic identities (Pythagorean, reciprocal, quotient) to simplify expressions

Practice this skill

Adaptive questions on trigonometric functions and the unit circle.

Practise this topic

0% read

Solve simple trigonometric equations over a given interval

This lesson hasn’t been written yet

ACT lessons are written from the official syllabus the first time a learner opens them, then saved for everyone. Sign in and this one is written for you in a minute or two. It’s free.

PreviousExponential and logarithmic functions Next lessonAngles, triangles and polygons