Đại số Ví dụ

\frac{2 sin (A) cos (A) - cos (A)}{1 - sin (A) + {sin}^{2} (A) {cos}^{2} (A)}

$\frac{2 \sin (A) \cos (A) - \cos (A)}{1 - \sin (A) + \sin^{2} (A) \cos^{2} (A)}$

Bước 1

Đưa

cos (A)

$\cos (A)$ ra ngoài

2 sin (A) cos (A)

$2 \sin (A) \cos (A)$ .

\frac{cos (A) (2 sin (A)) - cos (A)}{1 - sin (A) + {sin}^{2} (A) {cos}^{2} (A)}

$\frac{\cos (A) (2 \sin (A)) - \cos (A)}{1 - \sin (A) + \sin^{2} (A) \cos^{2} (A)}$

Bước 2

Đưa

cos (A)

$\cos (A)$ ra ngoài

- cos (A)

$- \cos (A)$ .

\frac{cos (A) (2 sin (A)) + cos (A) \cdot - 1}{1 - sin (A) + {sin}^{2} (A) {cos}^{2} (A)}

$\frac{\cos (A) (2 \sin (A)) + \cos (A) \cdot - 1}{1 - \sin (A) + \sin^{2} (A) \cos^{2} (A)}$

Bước 3

Đưa

cos (A)

$\cos (A)$ ra ngoài

cos (A) (2 sin (A)) + cos (A) \cdot - 1

$\cos (A) (2 \sin (A)) + \cos (A) \cdot - 1$ .

\frac{cos (A) (2 sin (A) - 1)}{1 - sin (A) + {sin}^{2} (A) {cos}^{2} (A)}

$\frac{\cos (A) (2 \sin (A) - 1)}{1 - \sin (A) + \sin^{2} (A) \cos^{2} (A)}$

$\frac{2 \sin (A) \cos (A) - \cos (A)}{1 - \sin (A) + \sin^{2} (A) \cos^{2} (A)}$

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