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  1. AP Calculus
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What are the differences between parametric equations and Cartesian equations?

Parametric: x and y are functions of t | Cartesian: y is a function of x

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What are the differences between parametric equations and Cartesian equations?

Parametric: x and y are functions of t | Cartesian: y is a function of x

What are the differences between integrating vector-valued functions and integrating scalar functions?

Vector-Valued: Integrate each component separately, result is a vector | Scalar: Integrate a single function, result is a scalar

What are the differences between finding the area between curves in Cartesian coordinates vs. polar coordinates?

Cartesian: Integrate difference of functions wrt x, A = ∫(top - bottom) dx | Polar: Integrate difference of squared polar functions wrt θ, A = 1/2 ∫(R² - r²) dθ

What are the differences between velocity and speed?

Velocity: Vector quantity with magnitude and direction | Speed: Scalar quantity, magnitude of velocity

What are the differences between position vector and velocity vector?

Position Vector: Represents location at a given time | Velocity Vector: Represents rate of change of position at a given time

What are the differences between polar coordinates and Cartesian coordinates?

Polar: Defined by radius and angle (r, θ) | Cartesian: Defined by horizontal and vertical distance (x, y)

What are the differences between differentiating parametric equations and differentiating Cartesian equations?

Parametric: Use chain rule, dydx=dy/dtdx/dt\frac{dy}{dx} = \frac{dy/dt}{dx/dt}dxdy​=dx/dtdy/dt​ | Cartesian: Direct differentiation, dydx\frac{dy}{dx}dxdy​

What are the differences between integrating parametric equations and integrating Cartesian equations?

Parametric: Integrate with respect to t | Cartesian: Integrate with respect to x

What are the differences between vector-valued functions and scalar functions?

Vector-valued: Output is a vector | Scalar: Output is a single number

What are the differences between finding arc length in Cartesian coordinates vs. parametric coordinates?

Cartesian: Integrate 1+(dy/dx)2\sqrt{1 + (dy/dx)^2}1+(dy/dx)2​ dx | Parametric: Integrate (dx/dt)2+(dy/dt)2\sqrt{(dx/dt)^2 + (dy/dt)^2}(dx/dt)2+(dy/dt)2​ dt

What is the formula for the derivative of a parametric function, dydx\frac{dy}{dx}dxdy​?

dydx=dy/dtdx/dt\frac{dy}{dx} = \frac{dy/dt}{dx/dt}dxdy​=dx/dtdy/dt​

What is the formula for the second derivative of a parametric function, d2ydx2\frac{d^2y}{dx^2}dx2d2y​?

d2ydx2=ddt(dydx)dxdt\frac{d^2y}{dx^2} = \frac{\frac{d}{dt}(\frac{dy}{dx})}{\frac{dx}{dt}}dx2d2y​=dtdx​dtd​(dxdy​)​

What is the formula for arc length of a parametric curve?

L=∫ab(dxdt)2+(dydt)2dtL = \int_{a}^{b} \sqrt{(\frac{dx}{dt})^2 + (\frac{dy}{dt})^2} dtL=∫ab​(dtdx​)2+(dtdy​)2​dt

What is the formula to find the area of a polar region?

A=12∫abr2dθA = \frac{1}{2} \int_{a}^{b} r^2 d\thetaA=21​∫ab​r2dθ

What is the formula to find the area between two polar curves?

A=12∫ab(R2−r2)dθA = \frac{1}{2} \int_{a}^{b} (R^2 - r^2) d\thetaA=21​∫ab​(R2−r2)dθ

How do you convert from polar to Cartesian coordinates?

x=rcos⁡(θ),y=rsin⁡(θ)x = r \cos(\theta), y = r \sin(\theta)x=rcos(θ),y=rsin(θ)

How do you convert from Cartesian to polar coordinates?

r=x2+y2r = \sqrt{x^2 + y^2}r=x2+y2​

What is the formula for dydx\frac{dy}{dx}dxdy​ in polar coordinates?

dydx=drdθsin⁡(θ)+rcos⁡(θ)drdθcos⁡(θ)−rsin⁡(θ)\frac{dy}{dx} = \frac{\frac{dr}{d\theta} \sin(\theta) + r \cos(\theta)}{\frac{dr}{d\theta} \cos(\theta) - r \sin(\theta)}dxdy​=dθdr​cos(θ)−rsin(θ)dθdr​sin(θ)+rcos(θ)​

If r(t) = <f(t), g(t)>, what is r'(t)?

r'(t) = <f'(t), g'(t)>

If v(t) = <f(t), g(t)>, what is ∫v(t) dt?

∫v(t) dt = <∫f(t) dt, ∫g(t) dt>

How to find the velocity vector at t=a given a position vector r(t)?

  1. Find the derivative r'(t). 2. Evaluate r'(a).

How to find the acceleration vector at t=a given a position vector r(t)?

  1. Find the second derivative r''(t). 2. Evaluate r''(a).

How to find the arc length of a parametric curve from t=a to t=b?

  1. Find dxdt\frac{dx}{dt}dtdx​ and dydt\frac{dy}{dt}dtdy​. 2. Use the formula L=∫ab(dxdt)2+(dydt)2dtL = \int_{a}^{b} \sqrt{(\frac{dx}{dt})^2 + (\frac{dy}{dt})^2} dtL=∫ab​(dtdx​)2+(dtdy​)2​dt.

How to find the area of a polar region?

  1. Determine the limits of integration, a and b. 2. Identify the polar function r(θ). 3. Use the formula A=12∫abr2dθA = \frac{1}{2} \int_{a}^{b} r^2 d\thetaA=21​∫ab​r2dθ.

How to find the area between two polar curves?

  1. Determine the limits of integration, a and b. 2. Identify the outer curve R(θ) and the inner curve r(θ). 3. Use the formula A=12∫ab(R2−r2)dθA = \frac{1}{2} \int_{a}^{b} (R^2 - r^2) d\thetaA=21​∫ab​(R2−r2)dθ.

How to find the equation of a tangent line to a parametric curve at t=t₀?

  1. Find dydx=dy/dtdx/dt\frac{dy}{dx} = \frac{dy/dt}{dx/dt}dxdy​=dx/dtdy/dt​. 2. Evaluate dydx\frac{dy}{dx}dxdy​ at t=t₀ to find the slope. 3. Find x(t₀) and y(t₀) to find the point. 4. Use point-slope form to write the equation of the tangent line.

How to convert a point from polar coordinates (r, θ) to Cartesian coordinates (x, y)?

  1. Use the formulas x = r cos(θ) and y = r sin(θ). 2. Substitute the values of r and θ into the formulas. 3. Calculate x and y.

How to find the maximum height of a particle moving according to parametric equations?

  1. Find dydt\frac{dy}{dt}dtdy​. 2. Set dydt=0\frac{dy}{dt} = 0dtdy​=0 and solve for t. 3. Find the y-coordinate at that t value.

How to determine when a particle changes direction in its x-coordinate movement?

  1. Find dxdt\frac{dx}{dt}dtdx​. 2. Set dxdt=0\frac{dx}{dt} = 0dtdx​=0 and solve for t. 3. Check if the sign of dxdt\frac{dx}{dt}dtdx​ changes around that t value.

How to determine the speed of a particle given its velocity vector?

  1. Find the velocity vector v(t) = <dx/dt, dy/dt>. 2. Calculate the magnitude of the velocity vector: speed = (dxdt)2+(dydt)2\sqrt{(\frac{dx}{dt})^2 + (\frac{dy}{dt})^2}(dtdx​)2+(dtdy​)2​