

\r 



WEB PLATES 



th- iui.-iiHf y of 8tmw on Or, t! 



+qXA< } Jt -gcol 9. () 





or -- 



(8) 



Subtracting the second form of In from (a), 

 Py-p,-g(cot 0-tan 0)-q 7~jT "< 

 ..i tan 20- . The solution of thi gives two vi 



DM * J^* 



of 0, one of which rorrrspomls to OP and tin- nthrr to OP*. 

 Further, multiplying (a) by (6), 



- 



P - 



- HP. + P, V(p.-p.)+49] 



