Question

ПОЖАЛУЙСТА УМОЛЯЯЯЮ ПОМОГИТЕ ОООЧЕНЬ СРОЧНО !!! УПРАСТИТЕ ВЫРАЖЕНИЕ ПО ТРИГОНОМЕТРИИ: 9;10. БУДУ ОООЧЕНЬ БЛАГОДАРЕН ЗА ОТВЕТ!​

Answer 1

Ответ:

9)

$\frac{sin(a)}{1+cos(a)}+ctg(a)\\\\\frac{sin(a)}{1+cos(a)}+\frac{cos(a)}{sin(a)} \\\\\frac{sin(a)*sin(a)}{1+cos(a)*sin(a)}+\frac{cos(a)*(1+cos(a))}{sin(a)*(1+cos(a))}\\\\\frac{sin(a)^2 + (1+cos(a))*cos(a)}{sin(a)*(1+cos(a))} \\\\\frac{sin(a)^2+cos(a)^2+cos(a)}{sin(a)*(1+cos(a))} \\\\\frac{\not(1+cos(a))}{sin(a)*\not(1+cos(a))} \\\\\frac{1}{sin(a)}$

10)

$\frac{cos(a)}{1-sin(a)}-tg(a)\\\\\frac{cos(a)}{1-sin(a)}-\frac{sin(a)}{cos(a)} \\\\\frac{cos(a)*cos(a)}{cos(a)*(1-sin(a))}-\frac{sin(a)*(1-sin(a))}{cos(a)*(1-sin(a))} \\\\\frac{cos(a)^2 - (1-sin(a))*sin(a)}{cos(a)*(1-sin(a))} \\\\\frac{cos(a)^2+sin(a)^2-sin(a))}{cos(a)*(1-sin(a))} \\\\\frac{cos(a)^2- (-sin(a)^2+sin(a))}{cos(a)*(1-sin(a))} \\\\\frac{\not(1-sin(a))}{cos(a)*\not(1-sin(a))} \\\\\frac{1}{cos(a)}$

Пошаговое объяснение: