True or False? Justify your answer with a proof or a counterexample.
2. The equations x=cosh(3t)x=cosh(3t), y=2sinh(3t)y=2sinh(3t) represent a hyperbola.
3. The arc length of the spiral given by r=θ2r=θ2 for 0≤θ≤3π0≤θ≤3π is 94π394π3.
4. Given x=f(t)x=f(t) and y=g(t)y=g(t), if dxdy=dydxdxdy=dydx, then f(t)=g(t)+C,f(t)=g(t)+C, where C is a constant.
For the following exercises, sketch the parametric curve and eliminate the parameter to find the Cartesian equation of the curve.
6. x=etx=et, y=1−e3ty=1−e3t, 0≤t≤10≤t≤1
7. x=sinθx=sinθ, y=1−cscθy=1−cscθ, 0≤θ≤2π0≤θ≤2π
8. x=4cosφx=4cosφ, y=1−sinφy=1−sinφ, 0≤φ≤2π0≤φ≤2π
For the following exercises, sketch the polar curve and determine what type of symmetry exists, if any.
10. r=5cos(5θ)r=5cos(5θ)
For the following exercises, find the polar equation for the curve given as a Cartesian equation.
11. x+y=5x+y=5
12. y2=4+x2y2=4+x2
For the following exercises, find the equation of the tangent line to the given curve. Graph both the function and its tangent line.
14. r=3+cos(2θ)r=3+cos(2θ), θ=3π4θ=3π4
For the following exercises, find the area of the region.
16. x=t2x=t2, y=ln(t)y=ln(t), 0≤t≤e0≤t≤e
For the following exercises, find the arc length of the curve over the given interval.
18. x=3t+4x=3t+4, y=9t−2y=9t−2, 0≤t≤30≤t≤3
For the following exercises, find the Cartesian equation describing the given shapes.
20. A parabola with focus (2,−5)(2,−5) and directrix x=6x=6
22. A hyperbola with vertices at (3,−2)(3,−2) and (−5,−2)(−5,−2) and foci at (−2,−6)(−2,−6) and (−2,4)(−2,4)
For the following exercises, determine the eccentricity and identify the conic. Sketch the conic.
24. r=43−2cosθr=43−2cosθ
26. Determine the Cartesian equation describing the orbit of Pluto, the most eccentric orbit around the Sun. The length of the major axis is 39.26 AU and minor axis is 38.07 AU. What is the eccentricity?
Candela Citations
- Calculus Volume 2. Authored by: Gilbert Strang, Edwin (Jed) Herman. Provided by: OpenStax. Located at: https://openstax.org/books/calculus-volume-2/pages/1-introduction. License: CC BY-NC-SA: Attribution-NonCommercial-ShareAlike. License Terms: Access for free at https://openstax.org/books/calculus-volume-2/pages/1-introduction