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Wave Equation In Exercises 99-102, show that the function satisfies the wave equation
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Calculus: Early Transcendental Functions
- Determine whether the given complex functions satisfy (have derivatives) the Cauchy-Riemann equations (z E C) b) f(z) = x² + iy? c) f(z) = e*e¬iyarrow_forwardA charged particle begins at rest at the origin. Suddenly, a force causes the particleto accelerate according to the vector function a(t) = ⟨ sin(t) , 6t , 2cos(t)⟩Find functions for the velocity, speed and position of the particle at time tarrow_forwardLet x be an n-vector. (a) Is it possible for x · x to be negative? Explain. (b) If x · x = 0, what is x?arrow_forward
- Exercise III Let (a) o = x²y +xż and (b) ó = x² + y² + z?. Then, respectively attempt to find the directional derivative at • (1,2, 1) in the direction of the vector (2i - 3j+ 4k). • (3,0, 1) in the direction of the vector (i- 3j + 2k).arrow_forwardCHAPTER 16 REVIEW Make a simple sketch of the vector field F=(x-y)i +x].arrow_forwardSketch the curve represented by the vector-valued function r(t) = ⟨ cos t, sin t ⟩ and give the orientation of the curve.arrow_forward
- Sketch the curve whose vector equation is Solution r(t) = 6 cos(t) i + 6 sin(t) j + 3tk. The parametric equations for this curve are X = I y = 6 sin(t), z = Since x² + y² = + 36. sin²(t) = The point (x, y, z) lies directly above the point (x, y, 0), which moves counterclockwise around the circle x² + y2 = in the xy-plane. (The projection of the curve onto the xy-plane has vector equation r(t) = (6 cos(t), 6 sin(t), 0). See this example.) Since z = 3t, the curve spirals upward around the cylinder as t increases. The curve, shown in the figure below, is called a helix. ZA (6, 0, 0) (0, 6, 37) I the curve must lie on the circular cylinder x² + y² =arrow_forwardVector 1 A) Prove that: V x (FxG) = (GV)F- (FV)G+ F(VG) - G(V.F). B) Find all of the second derivatives for f(x. y) = (3xy² + 2xy + x²) In: +y² Brie differente directia derivatives with stable gnh an eations. Find the direcional avati 220. vector in t direction of ere E) Evaluat the trde integral I need answer Only branch A (a) dx dy= (b) dyd = 24 GEL direct رسالت +vana is the unitarrow_forwardFind the direction in which the maximum rate of change occurs for the function f(x, y) = 4x sin(xy) at the point (1,5). Give your answer as a unit vector. (sin(5) + 5 cos(5))i + cos(15) i 1+ (5 cos (5))² + 10 sin(5) - cos (5) x Invalid notation. syntax incomplete.arrow_forward
- Sketch and describe the curve defined by the vector-valued function below. 7(t) = (t cos t, t, t sin t), t > 0. Explain, in words, some properties of the curve as t gets bigger.arrow_forwardThe position vector r describes the path of an object moving in the xy-plane. Position Vector Point r(t) = 4 cos ti + 4 sin t (2V2,2V2) (a) Find the velocity vector v(t), speed s(t), and acceleration vector a(t) of the objeot. v(t) s(t) = a(t) = (b) Evaluate the velocity vector and acceleration vector of the object at the given point.arrow_forward(5) Let ß be the vector-valued function 3u ß: (-2,2) × (0, 2π) → R³, B(U₁₂ v) = { 3u² 4 B (0,7), 0₁B (0,7), 0₂B (0,7) u cos(v) VI+ u², sin(v), (a) Sketch the image of ß (i.e. plot all values ß(u, v), for (u, v) in the domain of ß). (b) On the sketch in part (a), indicate (i) the path obtained by holding v = π/2 and varying u, and (ii) the path obtained by holding u = O and varying v. (c) Compute the following quantities: (d) Draw the following tangent vectors on your sketch in part (a): X₁ = 0₁B (0₂7) B(0)¹ X₂ = 0₂ß (0,7) p(0.4)* ' cos(v) √1+u² +arrow_forward
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:Cengage