00:01
Given that f x comma y comma z is equals to minus y plus z i plus x minus z j cap plus x minus y k cap.
00:17
So, s is z is equals to root 1 minus x square minus y square.
00:24
So, z square is equals to 1 minus x square plus y square or x square plus y square plus z square is equals to 1 where z is greater than equals to 0.
00:41
So, which is the upper half of the surface of sphere x square plus y square plus z square equals to 1.
01:05
So, let c be its bounding, let c be its boundary in x y plane then the equation of curve c is c x square plus y square equals to 1 where z is equals to 0 the unit circle.
01:43
So, the parameter, parametric equation of c is x equals to cos, cos s equals to cos t and y is equals to sin t and z is equals to 0.
02:02
So, 0 is smaller than equals to t and t is smaller than equals to 2 pi.
02:07
This is our equation number 1 and line integral is given by integration c f vector d r vector equals to equals to integration c minus y plus z i cap plus x minus z j cap plus x minus y k cap multiplying by dx i cap plus dy j cap plus dz k cap.
02:58
So, is equals to integration c minus y plus z dx plus x minus z dy plus x minus y dz using the parametric formula form in equation 1.
03:20
So, using parametric form in equation 1.
03:35
So, we get f vector d r vector is equals to integration 0 to 2 pi minus sin t multiplying by minus sin t dt plus integration 0 to 2 pi cos t multiplying by cos t dt...