Question

me ajudem, por favor

Answer 1

a) respondida na foto

b)$cos30=\frac{x}{20}$

$\frac{\sqrt{3} }{2} =\frac{x}{20}$

$\frac{10\sqrt{3} }{20}=\frac{x}{20}$

$x=10\sqrt{3}$

c)$cos60=\frac{20}{x}$

$\frac{1}{2}=\frac{20}{x}$

$x=20.2$

$x=40$

d)$sen45=\frac{x}{12}$

$\frac{\sqrt{2} }{2} =\frac{x}{12}$

$2x=12\sqrt{2}$

$x=6\sqrt{2}$

e)$tan40=x/10$

$x=10tan40$