Verified answer

наименьшее -√2

наибольшее √2

sina-sinb=2sin((a=b)/2)cos((a+b)/2)

sin(2a+9П/16)-sin(2a+П/16)=2sinП/4cos(2a+5П/16)=√2cos(2a+5П/16)

-1<=cos(2a+5П/16)<=1

-√2<=√2cos(2a+5П/16)<=√2