Estimate the area of the surface generated by revolving the curve y=cos(2x),
0≤x≤pi/4 about the x-axis. Use the trapezoidal rule with five subdivisions.
Give your answer accurate to four decimal places.
0.9072
AAAaannndd the bot gets it wrong yet again!
0.49588
a handy online calculator is at
emathhelp. net/calculators/calculus-2