Question

(cos135*sin210) / (tg135*ctg405)

Answer 1

решение:

(cos(135)sin(210) ÷($frac{sin(135)}{cos(135)}$ · cos(405))

cos(135)sin(210)÷ $frac{sin(135)cos(405)}{cos(135)}$

cos(135)sin(210) · $frac{cos(135)}{sin(135)cos(405)}$

ответ:

$frac{cos(135)}{sin(135)cos(405)}$

≈-5,44209