Register to reply

Ssec^3(w)dw is very easy but you need to pay atention!

by kallazans
Tags: atention, ssec3wdw
Share this thread:
kallazans
#1
Dec20-03, 11:46 AM
P: 5
Ssec^3(w)dw
it is very easy if you use integration by parts, but you need to pay atention!

how about use a partial fraction ? if you like to have a hard work!!

Someone agree with me?
Phys.Org News Partner Science news on Phys.org
Scientists develop 'electronic nose' for rapid detection of C. diff infection
Why plants in the office make us more productive
Tesla Motors dealing as states play factory poker
HallsofIvy
#2
Dec20-03, 06:49 PM
Math
Emeritus
Sci Advisor
Thanks
PF Gold
P: 39,562
Actually, the way I would do that is to write sec3w as
1/cos3(w) and sec3(w)dw as
cos(w)dw/cos4(w)= cos dw/(1- sin2(w))2, make the substitution u= sin(w) so the integral becomes
∫ du/(1-u2)2 and THEN use partial fractions. Is that what you meant?


Register to reply

Related Discussions
Easy Derivative - Not easy for me, though! Calculus & Beyond Homework 5
Guys, I have 4 easy questions. (probably easy to you) Introductory Physics Homework 32
Easy gauss' law question that I wanna make sure I didn't make too easy Advanced Physics Homework 0
Easy, easy question-please help... Set Theory, Logic, Probability, Statistics 1
Insulation of magnetic field. General Physics 15