1. z(bar)  +  i w(bar)  =  0

 

and   arg(zw) = pie

then find arg z

 

 

2.   a vector of magnitude 1/4  is resolved into OA and OB such that it makes an angle of 30  with OA and 45 with OB . find magnitude of vector along OB

 

 

3.  a line has direction cosiines proportional to 2,1,2 meets the lines

      x = y+a = z  and  x+a = 2y = 2z .find the coordiantes of point of intersection for both the lines