Riješi sin(θ_{1})=

$$\sin ( \theta _ { 1 } ) =$$

Diferenciraj u odnosu na θ_1

$$\cos(\theta _{1})$$

Koraci korištenja definicije derivacije

Za funkciju f\left(x\right) derivacija je limes od \frac{f\left(x+h\right)-f\left(x\right)}{h} pri čemu h teži 0, ako takav limes postoji.

$$\frac{\mathrm{d}}{\mathrm{d}\theta _{1}}(\sin(\theta _{1}))=\left(\lim_{h\to 0}\frac{\sin(\theta _{1}+h)-\sin(\theta _{1})}{h}\right)$$

Koristite formulu zbroja za sinus.

$$\lim_{h\to 0}\frac{\sin(h+\theta _{1})-\sin(\theta _{1})}{h}$$

Izlučite \sin(\theta _{1}).

$$\lim_{h\to 0}\frac{\sin(\theta _{1})\left(\cos(h)-1\right)+\cos(\theta _{1})\sin(h)}{h}$$

Ponovno napišite limes.

$$\left(\lim_{h\to 0}\sin(\theta _{1})\right)\left(\lim_{h\to 0}\frac{\cos(h)-1}{h}\right)+\left(\lim_{h\to 0}\cos(\theta _{1})\right)\left(\lim_{h\to 0}\frac{\sin(h)}{h}\right)$$

Koristite činjenicu da je \theta _{1} nepromjenljiv kad ograničenje računanja h stremi prema 0.

$$\sin(\theta _{1})\left(\lim_{h\to 0}\frac{\cos(h)-1}{h}\right)+\cos(\theta _{1})\left(\lim_{h\to 0}\frac{\sin(h)}{h}\right)$$

Limes od \lim_{\theta _{1}\to 0}\frac{\sin(\theta _{1})}{\theta _{1}} je 1.

$$\sin(\theta _{1})\left(\lim_{h\to 0}\frac{\cos(h)-1}{h}\right)+\cos(\theta _{1})$$

Da biste izračunali limes od \lim_{h\to 0}\frac{\cos(h)-1}{h}, prvo podijelite brojnik i nazivnik s \cos(h)+1.

$$\left(\lim_{h\to 0}\frac{\cos(h)-1}{h}\right)=\left(\lim_{h\to 0}\frac{\left(\cos(h)-1\right)\left(\cos(h)+1\right)}{h\left(\cos(h)+1\right)}\right)$$

Pomnožite \cos(h)+1 i \cos(h)-1.

$$\lim_{h\to 0}\frac{\left(\cos(h)\right)^{2}-1}{h\left(\cos(h)+1\right)}$$

Koristite pitagorejski identitet.

$$\lim_{h\to 0}-\frac{\left(\sin(h)\right)^{2}}{h\left(\cos(h)+1\right)}$$

Ponovno napišite limes.

$$\left(\lim_{h\to 0}-\frac{\sin(h)}{h}\right)\left(\lim_{h\to 0}\frac{\sin(h)}{\cos(h)+1}\right)$$

Limes od \lim_{\theta _{1}\to 0}\frac{\sin(\theta _{1})}{\theta _{1}} je 1.

$$-\left(\lim_{h\to 0}\frac{\sin(h)}{\cos(h)+1}\right)$$

Koristite činjenicu da je \frac{\sin(h)}{\cos(h)+1} nepromjenljiv pri 0.

$$\left(\lim_{h\to 0}\frac{\sin(h)}{\cos(h)+1}\right)=0$$

Supstituirajte vrijednost 0 u izrazu \sin(\theta _{1})\left(\lim_{h\to 0}\frac{\cos(h)-1}{h}\right)+\cos(\theta _{1}).

$$\cos(\theta _{1})$$

Izračunaj

$$\sin(\theta _{1})$$