5sin(-pi/6)/2cos(8pi/3)=5sin(-30)/2cos(480)=(5*(-0,5))/(2*(-0,5))=5/2=2,5
5sin(3pi/2 - 5pi/3)/2cos(pi+ 5pi/3)
5*sin(3*пи/2 - 5*пи/3) / (2*cos(пи+ 5*пи/3))
5/2
2.5
5sin(-pi/6)/2cos(8pi/3)=5sin(-30)/2cos(480)=(5*(-0,5))/(2*(-0,5))=5/2=2,5
5sin(3pi/2 - 5pi/3)/2cos(pi+ 5pi/3)
5*sin(3*пи/2 - 5*пи/3) / (2*cos(пи+ 5*пи/3))
5/2
2.5