Question

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

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