Skip to content
World 7 · Unit circle to sine wave · 8 min · PRO

e^(iθ) and the quarter-turn velocity

Why the derivative of sin is cos

PRO · Calculus & Probability

World 7: Unit circle to sine wave is part of PRO

The first world of Calculus & Probability is free. PRO opens the other 48 lessons in 6 worlds — simulations, quizzes and all.

  • Radians: measure an angle by its arc
  • Amplitude, frequency and phase
  • The helix: two graphs in one curve
PRO includes
  • All 26 labs — every world, every lesson
  • Practice exams and certificates

$8.33/mo, billed yearly ($99.99) · or $39.99 monthly

Unlock Calculus & ProbabilityTry the free world
← The helix: two graphs in one curve

Report a mistake

What is wrong?
0 / 2000 · at least 10 characters
Sent along with your report
  • Page
  • About e^(iθ) and the quarter-turn velocity — Calculus & Probability · calcprob/uc-euler
Plus your browser type. Reports go to our support system; see the privacy notice.