Line integral question (1 Viewer)

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

160
0
http://www.mrnerdy.com/forum_img/ask.JPG [Broken]

is the first stepc orrect?
TQ.
 
Last edited by a moderator:
201
0
yep, everything looks good.
 

Galileo

Science Advisor
Homework Helper
1,989
5
Yes, that's correct.

But (I guess) you've used a trig identity: [itex]z'(t)=2\sin t \cos t=\sin(2t)[/itex] in the last term. This will not make your integral easier. Best leave it as [itex]2\sin t \cos t[/itex].
 
160
0
thank you very much, eok and galileo!
 
160
0
i get 7/6
but when i follow galileo's advice, i get 7/3

please help me verify again. TQ.
 

TD

Homework Helper
1,020
0
The correct answer is 7/3 but it shouldn't matter whether you use that trig identity or not.
 
160
0
tq. i'll try to check back this question later.
 

The Physics Forums Way

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top