(evil) 



(8). 



(9)- 

 (,o) 

 (•0 



(.2) 



("4) 

 (,5) 

 (i6) 



(>7). 

 (i8) . 



(•9)- 



(.0). 



(a.) . 



(22) . 



(23) . 



(24) . 



A 



A(n-//)sinff 



, cosO= — 



3^' y' sin* if ' 



ci=sin — 9 ; 



..7.'=j/(,._0(.-^); 



\ n" / y n' iK' ' 



\ n' /y im' K" ' 



\ MuZ / ' 



^ 4 \ siQ>Z / ' 



1 -29, \l in/ ' 



J- 



{p-'—Xp'-t-riUw^Z ' 



