Krysten
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 May3 asked How to prove that $(A\cup B) \cap C \subseteq A\cup (B\cap C)$ Apr29 accepted Find the arc length of the cardioid: r = 3-3cos θ Apr29 comment Find the arc length of the cardioid: r = 3-3cos θ alright thanks! Apr29 comment Find the arc length of the cardioid: r = 3-3cos θ Does the θ/2 come from the fact that the original trig identity is 1-cos(2x) = 2 sin^2 x and you need the θ/2 to cancel out with the 2x? Apr29 accepted Find the area of the surface obtained by rotating the curve about the x axis Apr29 asked Find the arc length of the cardioid: r = 3-3cos θ Mar8 accepted How to sketch the curve of parametric equations Mar8 comment How to sketch the curve of parametric equations alright. thanks for all your help :) Mar8 comment How to sketch the curve of parametric equations i guess i was hoping for a "fast" solution, but i now know with parametric equations, there doesn't appear to be any simple or straightforward method. Mar8 comment How to sketch the curve of parametric equations very informative! ok so basically, you want to analyze exactly what the functions x and y are doing and that will give you the complete curve. and the part of the unit circle that is graphed is the right half. Mar8 comment How to sketch the curve of parametric equations sorry i had to finish editing my response Mar8 comment How to sketch the curve of parametric equations i see now. so sin θ >= 0 and then sin θ <= 1. so x >= 0 and <=1? Mar8 comment How to sketch the curve of parametric equations oh ok. so i could create a table of various points for t and then find the corresponding x and y values to determine the curve? Mar8 comment How to sketch the curve of parametric equations oh ok. so essentially, you can just plot the initial point, the ending point to get the shape of the curve, and a point in between to determine the direction of the curve? Mar8 asked How to sketch the curve of parametric equations Mar8 comment Find the area of the surface obtained by rotating the curve about the x axis ahh now i see! thanks Mar7 comment Find the area of the surface obtained by rotating the curve about the x axis After doing that I get: the integral from 0 to 1 of [(-2/pi) sqr(1 + u^2pi) du]. Would I have to do a trig substitution? Mar7 asked Find the area of the surface obtained by rotating the curve about the x axis Mar3 accepted Determining a closed-form solution for the following sum Mar3 comment Determining a closed-form solution for the following sum thanks! that cleared it up