Interactive tool
A 28 question bank across 8 trigonometry skills, answered in the browser with an explanation after every question. Rounds are scored, and your scores build up in the Progress section of the workspace.
Nothing to install, no account, and no results leave your device. Today's 15 question round is free and can be retaken as often as you like; choosing your own topics, and getting a freshly shuffled round each time, comes with Premium. Start a round below.
A 15 question mixed round, the same for everyone today and renewed each day. Retake it as often as you like. Your accuracy is tracked in Progress.
Today's round is fixed and shared, so retaking it asks you the same 15 questions. Premium lets you pick the topics you are weakest on and draws a freshly shuffled round every time you start one.
Every identity page, topic page, the unit-circle explorer, and the triangle solver stay free forever.
No quizzes yet - take your first round.
The bank is grouped by skill rather than by chapter, so a weak score points at something specific to revise instead of at trigonometry in general.
| Topic | Questions | What it asks |
|---|---|---|
| Exact values | 5 | Sine, cosine and tangent at the standard angles, with no calculator. |
| Quadrant signs | 3 | Which of the three functions is positive in a given quadrant, and why. |
| Reference angles | 3 | Reducing an angle outside Quadrant I to its acute reference angle. |
| Deg ↔ Rad | 4 | Converting between degrees and radians in both directions. |
| SOHCAHTOA | 4 | Naming the right-triangle ratio and using it to find a missing side. |
| Triangle laws | 3 | Choosing between the law of sines and the law of cosines, and stating them. |
| Graph transforms | 3 | Reading amplitude, period and phase shift off a sine or cosine equation. |
| Inverse trig | 3 | Principal values, ranges and domains of arcsine, arccosine and arctangent. |
Answer first, read second. The explanation appears only after you commit to an option, which is deliberate: recognising the right answer in a list is a much weaker skill than producing it, and the delay is what turns a round into practice rather than reading.
Scores are written to this browser's local storage and never sent anywhere. That keeps the quiz account-free, and it also means results do not follow you to another browser or survive clearing site data. The Progress section can reset the history at any time.
The bank holds 28 multiple-choice questions across 8 topics: exact values, quadrant signs, reference angles, degree and radian conversion, SOHCAHTOA, the triangle laws, graph transformations and inverse trig. Every question carries an explanation that appears the moment you answer.
Neither. The quiz runs in the browser and your results are kept in that browser's local storage, so nothing is uploaded and nothing is tied to an account. Clearing site data clears your history.
Yes. Choosing an option reveals the correct answer immediately along with a one-line explanation, and the end-of-round review lists every question with the answer it wanted. Feedback that arrives while the question is still in mind is what makes the round worth repeating.
Each finished round is recorded with its score and per-question topic. Your totals and your most recent rounds are free in the Progress section on the workspace. Turning that history into an accuracy figure per skill, which is what tells you whether to go back to the unit circle or to the triangle laws, is part of Premium.
If exact values or quadrant signs are shaky, work the unit circle page first, since a large share of the bank comes straight off it. If the triangle law questions are the problem, the law of sines versus law of cosines guide states the decision rule in one page.