How to find the position of a particle at t=a, given parametric equations x(t) and y(t)?
Substitute t=a into x(t) to find x-coordinate. 2. Substitute t=a into y(t) to find y-coordinate. 3. Position is (x(a), y(a)).
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How to find the position of a particle at t=a, given parametric equations x(t) and y(t)?
Substitute t=a into x(t) to find x-coordinate. 2. Substitute t=a into y(t) to find y-coordinate. 3. Position is (x(a), y(a)).
How to find the velocity vector v(t) given a position vector r(t)=<x(t), y(t)>?
Find the derivative of x(t) with respect to t. 2. Find the derivative of y(t) with respect to t. 3. v(t) = <x'(t), y'(t)>.
How to find the speed of a particle at t=a, given v(t)=<x'(t), y'(t)>?
Evaluate x'(a) and y'(a). 2. Speed = sqrt((x'(a))^2 + (y'(a))^2).
How to find the acceleration vector a(t) given v(t)=<x'(t), y'(t)>?
Find the derivative of x'(t) with respect to t. 2. Find the derivative of y'(t) with respect to t. 3. a(t) = <x''(t), y''(t)>.
How to determine the conic section from its equation?
Check for x^2 and y^2 terms. 2. If both are present and have the same coefficient, it's a circle. 3. If both are present and have different coefficients but the same sign, it's an ellipse. 4. If one is present, it's a parabola. 5. If both are present with opposite signs, it's a hyperbola.
How to add two matrices A and B?
Ensure A and B have the same dimensions. 2. Add corresponding elements: (A+B)[i,j] = A[i,j] + B[i,j].
How to find the determinant of a 2x2 matrix?
For matrix [[a, b], [c, d]], multiply ad and bc. 2. Subtract: determinant = ad - bc.
How to parametrize a circle x^2 + y^2 = r^2?
Let x = rcos(t). 2. Let y = rsin(t).
How to find the sum of two vectors u = <a, b> and v = <c, d>?
Add the x-components: a + c. 2. Add the y-components: b + d. 3. Result: u + v = <a+c, b+d>.
How to convert an implicit equation to standard form for a circle?
Complete the square for both x and y terms. 2. Rewrite the equation in the form (x-h)^2 + (y-k)^2 = r^2.
Parametric equation of a circle, center (0,0), radius r?
x=rcos(t), y=rsin(t)
Magnitude of vector v = <a, b>?
∣∣v∣∣=a2+b2
Position vector r(t), how to find velocity vector v(t)?
v(t)=r′(t)=<dtdx,dtdy>
Velocity vector v(t), how to find speed?
Speed=∣∣v(t)∣∣=(dtdx)2+(dtdy)2
Position vector r(t), how to find acceleration vector a(t)?
a(t)=v′(t)=r′′(t)=<dt2d2x,dt2d2y>
Determinant of a 2x2 matrix [[a, b], [c, d]]?
det([[a,b],[c,d]])=ad−bc
Equation of a circle in standard form?
(x−h)2+(y−k)2=r2
Standard form equation of an ellipse?
a2(x−h)2+b2(y−k)2=1
Standard form equation of a hyperbola?
a2(x−h)2−b2(y−k)2=1 or a2(y−k)2−b2(x−h)2=1
Parametric form for x and y?
x=f(t),y=g(t)
Explain Parametric Functions.
Functions that define x and y coordinates using a parameter, often 't', allowing representation of motion along a path.
Explain Implicitly Defined Functions.
Functions defined by a relationship between x and y, not explicitly solved for y, such as conic sections.
Explain Vectors.
Mathematical objects with magnitude and direction, used to represent physical quantities like force, velocity, and displacement.
Explain Matrices.
Rectangular arrays of numbers used to represent linear transformations, solve systems of equations, and perform complex operations.
Explain Conic Sections.
Shapes formed by slicing a cone, including circles, ellipses, parabolas, and hyperbolas, all examples of implicitly defined functions.
Explain Vector-Valued Functions.
Functions that output vectors, used to describe the position of a moving object over time, essential for understanding motion in physics and engineering.
Explain the significance of the derivative of a parametric function.
The derivatives dx/dt and dy/dt represent the rates of change of x and y with respect to the parameter t, indicating speed and direction.
Explain how matrices can act as functions.
Matrices can transform vectors, which is crucial in linear algebra and computer graphics for operations like scaling, rotation, and translation.
Explain the concept of parametrization.
Expressing implicitly defined functions using parameters (like 't') to make graphing and analysis easier, especially for complex shapes.
What does the determinant of a matrix tell you?
The determinant indicates whether the matrix is invertible; a non-zero determinant means the matrix has an inverse.