uses crt;
var x,p,s:real;
n,i:integer;
begin
clrscr;
write('x=');
readln(x);
write('n=');
readln(n);
s:=0;
p:=1;
for i:=1 to n do
begin
p:=p*sin(x);
s:=s+p;
end;
write('S=',s:0:4);
readln
end.
uses crt;
var x,p,s:real;
n,i:integer;
begin
clrscr;
write('x=');
readln(x);
write('n=');
readln(n);
s:=0;
p:=1;
for i:=1 to n do
begin
p:=p*sin(x);
s:=s+p;
end;
write('S=',s:0:4);
readln
end.