Răspuns :
sin(-5003π/6)=-sin(5003π/6)=-sin(4998π/6+5π/6)=-sin(833π+5π/6)=
=-sin (822π+π+5π/6)=
=-sin(411*2π+π+5π/6)=
=-sin(π+5π/6)=
=-sin(11π/6)
=sin(-11π/6)
=sin(2π-11π/6)
=sin(π/6)=1/2>0 semnul este+
as simple as that!!
=-sin (822π+π+5π/6)=
=-sin(411*2π+π+5π/6)=
=-sin(π+5π/6)=
=-sin(11π/6)
=sin(-11π/6)
=sin(2π-11π/6)
=sin(π/6)=1/2>0 semnul este+
as simple as that!!
Funcția sin este funcție impară, adică sin(-x) = - sinx.
Funcția sin este funcție periodică, de perioadă T = 2kπ, k∈ℤ.
sin (x + 2kπ) = sinx
[tex]\it sin\left(-\dfrac{5003\pi}{6}\right) = -sin\left(\dfrac{5003\pi}{6}\right) = -sin\left(\dfrac{5004\pi -\pi}{6}\right) = \\ \\ \\ =-sin\left(834\pi-\dfrac{\pi}{6}\right) = -sin\left(-\dfrac{\pi}{6}+2\cdot417\pi\right) = -sin\left(-\dfrac{\pi}{6}\right) = \\ \\ \\ =sin\left(\dfrac{\pi}{6}\right) = \dfrac{1}{2} \ \textgreater \ 0[/tex]