Question

Срочно нужно решение помогите!!!!буду очень благодарен!!!)))

Answer 1

$\frac{\sin \alpha}{1+\cos\alpha}+ \frac{1+\cos\alpha}{\sin\alpha}= \frac{2}{\sin\alpha}\\\\ \frac{\sin^2\alpha+\cos^2\alpha+2\cos\alpha+1}{\sin\alpha(1+\cos\alpha)}= \frac{2}{\sin\alpha} \\\\ \frac{2+2\cos\alpha}{\sin\alpha(1+\cos\alpha)} = \frac{2}{\sin\alpha} \\\\ \frac{2(1+\cos\alpha)}{\sin\alpha(1+\cos\alpha)}= \frac{2}{\sin\alpha} \\\\ \frac{2}{\sin\alpha} =\frac{2}{\sin\alpha}$