(a) Find the exact length of the curve y = 1/6 (x2 +
4)(3/2) , 0 ≤ x ≤ 3. (b) Find the exact area of the
surface obtained by rotating the curve in part (a) about the
y-axis.
I got part a I NEED HELP on part b
Use the formulas for arc length and surface area and the
equation x^2+y^2=R^2
(a)... to derive the formula for the surface area of a sphere
with radius R
(b)... to derive the formula for the circumference of a circle
with radius R
given the curve x(t)=t^2+3 and y(t)=2t^3-3t^2 find the following:
a.) find the derivative of the curve at t=1
b.) dind the concavity of the curve
c.) graph the curve from t=0 to t=2
d.) find the area if the curve on the interval
0<=t<=2