Question

Геометрия 8 класс...

Answer 1

Ответ:

$sin~\alpha=\dfrac{7}{25}$

Объяснение:

$tg~\alpha = \dfrac{7}{24}$

$ctg~\alpha = \dfrac{24}{7}$

$1 + ctg^2\alpha = \dfrac{1}{sin^2~\alpha}$

$1 + \dfrac{576}{49} = \dfrac{1}{sin^2~\alpha}$

$\dfrac{625}{49} = \dfrac{1}{sin^2~\alpha}$

$sin^2~\alpha = \dfrac{49}{625}$

$sin~\alpha = \dfrac{7}{25}$