2/3x-4/5=√sin30° sin 7π/4

Question

2/3x-4/5=√sin30° sin 7π/4

Answer 1

В
ычислим √sin30sin7π/4=1/√2*sin(2π-π/4)=1/√2*(-sinπ/4)=-1/√2*√2/2=-1/2=-0.5
2/3x-4/5=-1/2
2/3x=-1/2+4/5
2/3x=3/10
x=3/10:2/3=9/20=0,45