Nilaikan
-\frac{1}{2}=-0.5
Faktor
-\frac{1}{2} = -0.5
Kongsi
Disalin ke papan klip
\sin(\pi +\frac{\pi }{6})=\sin(\pi )\cos(\frac{\pi }{6})+\sin(\frac{\pi }{6})\cos(\pi )
Gunakan \sin(x+y)=\sin(x)\cos(y)+\sin(y)\cos(x) dimana x=\pi dan y=\frac{\pi }{6} untuk mendapatkan hasil.
0\cos(\frac{\pi }{6})+\sin(\frac{\pi }{6})\cos(\pi )
Dapatkan nilai \sin(\pi ) daripada nilai trigonometric.
0\times \frac{\sqrt{3}}{2}+\sin(\frac{\pi }{6})\cos(\pi )
Dapatkan nilai \cos(\frac{\pi }{6}) daripada nilai trigonometric.
0\times \frac{\sqrt{3}}{2}+\frac{1}{2}\cos(\pi )
Dapatkan nilai \sin(\frac{\pi }{6}) daripada nilai trigonometric.
0\times \frac{\sqrt{3}}{2}+\frac{1}{2}\left(-1\right)
Dapatkan nilai \cos(\pi ) daripada nilai trigonometric.
-\frac{1}{2}
Lakukan pengiraan.
Contoh
Persamaan kuadratik
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometri
4 \sin \theta \cos \theta = 2 \sin \theta
Persamaan linear
y = 3x + 4
Aritmetik
699 * 533
Matriks
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Persamaan serentak
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Pembezaan
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Pengamiran
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Had
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}