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Please help, last question!!

Please help, last question!!-example-1

2 Answers

3 votes

Answer:

b = 11.6 cm

Explanation:

PRIMERO ENCUENTRAS LA ALTURA DEL TRÍANGULO CON LAS

IDENTIDADES TRIGONOMÉTRICAS COMENSANDO POR EL LADO

IZQUIERDO.

8 cm(sen 82°) = 7.9 cm

AHORA ENCUENTRAS c.

c = 7.9 cm/sen 55° = 9.6 cm

FINÁLMENTE CON LA LEY DE SENOS.

sen 82°/b = sen 55°/9.6 cm

sen 82°/b = 0.0853

b = sen 82°/0.0853 = 11.6 cm

answered
User Brianandere
by
8.7k points
5 votes

Answer:

b =6.7

Explanation:

We can use the law of sines

We need to find angle B

180 = 82+55+B

180-82-55=B

43 = B

sin 55 sin (43)

------------- = --------------

8 b

Using cross products

b sin 55 = 8 sin 43

Divide by sin 55

b = 8 sin 43 / sin 55

b =6.66053014

To the nearest tenth

b =6.7

answered
User Rbrc
by
7.9k points

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