- #1
i2837856393
- 3
- 0
Homework Statement
[tex]\int[/tex]ydx + zdy
C
where C is the part of the helix r(t)=(sin t)(i) + (cos t)(j) + t(k)
and 0 < t < pi (those should be greater than or equal to signs)
[tex]\int[/tex](cost)(cost)-t(sint)
[tex]\int[/tex](1+cos 2t)/2 - t sint
with limits from zero to pi.
this then equaled to
1/2t + (sin 2t)/4 + tcost -sin t
and this gave me the answer 3(pi)/2
but the answer should be 3 pi..
can anyone else solve this and check please or tell me where i went wrong.