Question

alguém me ajuda pfv
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Answer 1

Resposta:

Explicação passo a passo:

1.

hipotenusa=50

adjacente=y

cos60°=1/2

1/2=y/50

2y=50

y=50/2

y=25

2.

hipotenusa=50

adjacente=y

cos30°=V3/2

V3/2=y/50

2y=50V3

y=50V3/2

y=25V3

3.

hipotenusa=80

oposto=x

sen30°=1/2

1/2=x/80

2x=80

x=80/2

x=40

4.

hipotenusa=100

oposto=x

adjacente=y

sen30°=1/2

cos30°=V3/2

1/2=x/100

2x=100

x=100/5

x=50

V3/2=y/100

2y-100V3

y=100V3/2

y=50V3

5.

oposto=x

adjacente=7

tg45º=1

1=x/7

1/1=x/7

1x=7.1

x=7