Question

a) 18,7 km
b) 20,25 km
c) 27,95 km
d) 30,72 km
e) 32,89 km​

Answer 1

tangente=sen/cos

tan(66)=h/x ==> 0,91/0,41=h/x  

x= h*0,41/0,91 =0,45054h  (i)

tan(58)=h/(30-x) ==>0,85/0,53=h/(30-x)

1,603773=h/(30-x)

1,603773*(30-x)=h  (ii)

(i)  em (ii)

1,603773*(30-0,45054h )=h  

1,603773*30-1,603773*0,45054h=h

1,603773*30=h+0,72256388742h

1,603773*30=1,723h

h= 1,603773*30/1,723 =27,92 km

Letra C