Whakaoti mō u
u\in \mathrm{R}
Tohaina
Kua tāruatia ki te papatopenga
\cos(u)=\cos(\frac{2u}{2})
Tuhia te 2\times \frac{u}{2} hei hautanga kotahi.
\cos(u)=\cos(u)
Me whakakore te 2 me te 2.
\cos(u)-\cos(u)=0
Tangohia te \cos(u) mai i ngā taha e rua.
0=0
Pahekotia te \cos(u) me -\cos(u), ka 0.
\text{true}
Whakatauritea te 0 me te 0.
u\in \mathrm{R}
He pono tēnei mō tētahi u ahakoa.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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699 * 533
Poukapa
\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]
whārite Simultaneous
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Whakarerekētanga
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Whakaurunga
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Ngā Tepe
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}