2x<π/3+πn
x<π/6+πn/2
x∈(-π/2+πn;π/6+πn/)
sin(x/2-π/4)+√2/2<0
sin(x/2-π/4)<-√2/2
5π/4+2πn<sin(x/2-π/4)<7π/4+2πn
5π/4-π/4+2πn<sinx/2<7π/4-π/4+2πn
π+2πn<sinx/2<3π/2+2πn
2π+4πn<sinx<3π+4πn
Объяснение:
9sin (x):(sin 13 *x*3*cos(s)^*x)
9sin(x)
-------------
sin(13)*x+3*cos(s)^*x
<span>49-(x+5)^2=0
49-(х+5)=0*2
</span>49-(х+5)=0
х+5=49-0
х+5=49
х=49-5
х=44