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 $\frac{dx}{dt}$ and $\frac{dy}{dt}$. 2. Use the formula $L = \int_{a}^{b} \sqrt{(\frac{dx}{dt})^2 + (\frac{dy}{dt})^2} dt$.
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 $A = \frac{1}{2} \int_{a}^{b} r^2 d\theta$.
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 $A = \frac{1}{2} \int_{a}^{b} (R^2 - r^2) d\theta$.
How to find the equation of a tangent line to a parametric curve at t=t₀?
1. Find $\frac{dy}{dx} = \frac{dy/dt}{dx/dt}$. 2. Evaluate $\frac{dy}{dx}$ 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 $\frac{dy}{dt}$. 2. Set $\frac{dy}{dt} = 0$ 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 $\frac{dx}{dt}$. 2. Set $\frac{dx}{dt} = 0$ and solve for t. 3. Check if the sign of $\frac{dx}{dt}$ 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 = $\sqrt{(\frac{dx}{dt})^2 + (\frac{dy}{dt})^2}$
What is a parametric equation?
An equation where x and y are defined in terms of a third variable, usually time (t).
Define a vector-valued function.
A function that maps a real number to a vector in a vector space, often representing position, velocity, or acceleration.
What are polar coordinates?
A two-dimensional coordinate system where a point is located by its distance (r) from the origin and angle (θ) from the positive x-axis.
What is arc length?
The distance along a curve defined by a function between two points.
Define a polar function.
A function of the form r = f(θ), where r is the distance from the origin and θ is the angle.
What is a polar plane?
A two-dimensional coordinate system in which the position of a point is determined by the distance from the origin (r) and the angle (theta θ) between the positive x-axis and the line connecting the point to the origin, counterclockwise.
What is the independent variable in a parametric equation?
Time (t).
What are the dependent variables in a parametric equation?
x and y.
What is the Cartesian plane?
The xy-plane, also known as ℝ^2.
What do vector-valued functions represent?
Position, velocity, and acceleration of an object moving in space.