Question

Me ajuda nesses exercicios ???

Answer 1

Ola Lucas 

7°

a) 

cos(60) = a/16 

1/2 = a/16

2a = 16
 
a = 8

b) 

tg(45) = y/7 

1 = y/7

y = 7

x² = 7² + 7² = 2*7²

x = 7√2 

b) 

sen(45) = a/(12√2) 

√2/2 = a/(12√2)

a = (√2/2)*(12√2) = 24/2 = 12

c) 

sen(60) = x/20

√3/2 = x/20 

2x = 20√3

x = 10√3

cos(60) = y/20 

1/2 = y/20

2y = 20 

y = 10