Multiple legend location in figure

Hi, I have a code similar to below where I want to put the legends at different location. This code is running well in 2014b but not in 2017a. Please help me out. Also tried with 'yyaxis' command but no luck.

a=[-360:1:360];
x=(2*pi/180).*a;
y1=sin(x);
y2=cos(x);
y3=sin(x).*cos(x);
figure
[ax,h1,h2]=plotyy(a,y1,a,y3);
h3=line(a,y2,'Color','r','LineWidth',1.5,'Parent',ax(1));
h4=line(a,zeros(1,721),'Color','k');
set(ax,'XLim',[-360 360]);
set(ax(1),'ylim',[-1.5 1.5])
set(ax(2),'ylim',[-1 1])
legend(ax(1),'sin','cos','Location','NorthEast')
legend(ax(2),'sin * cos','Location','NorthWest')

The above is my code.