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What parametric equations describe the unit circle?

A

x=3+5cos⁡θ,y=−2+5sin⁡θx=3+5\cos\theta,\quad y=-2+5\sin\thetax=3+5cosθ,y=−2+5sinθ

B

In x=a+rcos⁡θx=a+r\cos\thetax=a+rcosθ, y=b+rsin⁡θy=b+r\sin\thetay=b+rsinθ, multiplying sine and cosine by r\boxed{r}r​ changes the radius.

C

The restriction 0≤θ<2π\boxed{0\leq\theta<2\pi}0≤θ<2π​ traces a standard circle exactly once.

D

x=cos⁡θ,y=sin⁡θx=\cos\theta,\quad y=\sin\thetax=cosθ,y=sinθ

Card 1 of 20

1.5.15 Equation of a circle in parametric form (A-level only) Flashcards

  1. A Level
  2. /Maths
  3. /1.5.15 Equation of a circle in parametric form (A-level only)

20 flashcards on OCR (MEI) A Level Maths 1.5.15 Equation of a circle in parametric form (A-level only): the key formulae, methods and definitions you need to recall for Component 01, Component 02 and Component 03.

Flashcards