Kimi Pārōnaki e ai ki α
-2\sin(2\alpha )
Aromātai
\cos(2\alpha )
Pātaitai
Trigonometry
\cos 2 \alpha
Tohaina
Kua tāruatia ki te papatopenga
\left(-\sin(2\alpha ^{1})\right)\frac{\mathrm{d}}{\mathrm{d}\alpha }(2\alpha ^{1})
Mēnā ko F te hanganga o ngā pānga e rua e taea ana te pārōnaki f\left(u\right) me u=g\left(x\right), arā, mēnā ko F\left(x\right)=f\left(g\left(x\right)\right), ko te pārōnaki o F te pārōnaki o f e ai ki u whakareatia te pārōnaki o g e ai ki x, arā, \frac{\mathrm{d}}{\mathrm{d}x}(F)\left(x\right)=\frac{\mathrm{d}}{\mathrm{d}x}(f)\left(g\left(x\right)\right)\frac{\mathrm{d}}{\mathrm{d}x}(g)\left(x\right).
\left(-\sin(2\alpha ^{1})\right)\times 2\alpha ^{1-1}
Ko te pārōnaki o tētahi pūrau ko te tapeke o ngā pārōnaki o ōna kīanga tau. Ko te pārōnaki o tētahi kīanga tau pūmau ko 0. Ko te pārōnaki o te ax^{n} ko te nax^{n-1}.
-2\sin(2\alpha ^{1})
Whakarūnātia.
-2\sin(2\alpha )
Mō tētahi kupu t, t^{1}=t.
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