Question

Três questões sobre Trígonometria . ​

Answer 1

1)

a)sen B=12/15

b) cos B=9/15

c) tang B=12/9

d) sena=9/12

e) cos a =12/15

f) tang a=9/12

2)

tg15=1/x=0,26

x=1/0,26

x=3,84615

3)

a) sen 30=x/12

1/2=x/12

==>x=6

b)

tang 30=√3/3

r3/3=x/6√r3

x=√3*6√3/3=6  

c)

cos B= 3√2/x

√/2=3√2/x

1/2=3/x

x=3/2