Question

Sin 30×tg45+cos30×ctg60

Answer 1

Răspuns:

Explicație pas cu pas:

$sin(30) = \frac{1}{2}$

$tg(45) = 1$

$cos(30) = \frac{ \sqrt{3} }{2}$

$ctg(60) = \frac{ \sqrt{3} }{3}$

___________

$sin(30) \times tg(45) + cos(30) \times ctg(60) = \frac{1}{2} \times 1 + \frac{ \sqrt{3} }{2} \times \frac{ \sqrt{3} }{3}$

$= \frac{ {}^{3)} 1}{2} + \frac{3}{6} = \frac{3}{6} + \frac{3}{6} = \frac{6}{6} = \boxed{1}$

Answer 2

Răspuns:

1

Explicație pas cu pas:

sin 30·tg45+cos30·ctg 60=1/2·1+√3/2·√3/3=1/2+3·/2·3=1/2+1/2=1