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Trigonometric Functions — High School Pre-Calculus practice questions

16 multiple-choice questions and 26 flashcards on Trigonometric Functions, about 11% of the High School Pre-Calculus bank. Every one carries a written rationale.

Written and maintained by the CoStudy team · last updated 2026-10-02 · how we write and review questions

What this chapter covers

Trigonometric Functions is one of 10 chapters in CoStudy's High School Pre-Calculus bank, and it holds 16 of the bank's 150 multiple-choice questions — roughly 11% of the total. That proportion is not arbitrary: chapters follow the certifying body's published exam outline, and the number of questions in each is set by that domain's published weight, so the share of your practice time this chapter takes matches the share of the real exam it accounts for.

Studying by chapter is worth doing once you have a diagnostic score. A single overall percentage tells you whether you are close; it does not tell you which domain is dragging. Working a weak chapter in isolation, and re-testing it in isolation, is the fastest way to move a score that has stalled — and it is why the mock exams in CoStudy report by domain rather than as one number.

Free Trigonometric Functions practice questions

1 questions drawn from this chapter, with the full rationale shown — the controlling principle behind the right answer, and why each wrong option tempts and fails.

Convert 60° to radians.

  1. π/6
  2. π/2
  3. 60π
  4. π/3

Answer: D — π/3

D) Correct — Multiply by π/180: 60π/180 = π/3. A) Is 30°. B) Is 90°. C) Forgets to divide by 180.

Trigonometric Functions flashcards

4 cards from the 26 in this chapter.

What is the period of sin x and cos x?

2π.

What is the quotient identity for tan θ?

tan θ = sin θ / cos θ.

On the unit circle, what does cos θ represent?

The x-coordinate of the point at angle θ.

What is cos(60°)?

1/2.

Practise the full chapter

These are a sample. The full Trigonometric Functions chapter runs 42 items with per-chapter progress tracking, on the web and in the iOS app.

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