-4 sin (3x/4+п/4)>-2корней из 2

Question

-4 sin (3x/4+п/4)>-2корней из 2

Answer 1

-4sin(3x/4+π/4)>-2√2
sin(3x/4+π/4)<√2/2<br>3π/4+2πk<3x/4+π/4<9π/4+2πk<br>π/2+2πk<3x/4<2π+2πk<br>2π/3+8πk/3<x<3π/2+8πk/3