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Dengan menggunakan aturan cosinus, tentukanlah panjang x pada segitiga berikut diketahui: sisi depan= 1 sisi samping= 3 sisi miring= x sudut siku-siku= 60

dengan menggunakan aturan cosinus, tentukanlah panjang x pada segitiga berikut
diketahui:
sisi depan= 1
sisi samping= 3
sisi miring= x
sudut siku-siku= 60

Jawabannya adalah 2

Konsep :
cos A = sisi samping sudut A/sisi miring sudut A

cos 60ᵒ = 1/2

Jawab :
Misalkan gambar dari segitiga pada dilihat pada gambar di bawah.

cos 60ᵒ = sisi depan sudut 60ᵒ/sisi miring sudut 60ᵒ
1/2 = PQ/QR
1/2 = 1/QR
QR . 1/2 = 1
QR = 2
x = 2

Jadi panjang x adalah 2

Jawabannya adalah 2  Konsep : cos A = sisi samping sudut A/sisi miring sudut A  cos 60ᵒ = 1/2  Jawab : Misalkan gambar dari segitiga pada dilihat pada gambar di bawah.  cos 60ᵒ = sisi depan sudut 60ᵒ/sisi miring sudut 60ᵒ 1/2 = PQ/QR 1/2 = 1/QR QR . 1/2 = 1 QR = 2 x = 2  Jadi panjang x adalah 2

Baca Juga :  Complete the sentences with a form of the verb in parentheses. Three hundred and fifty years ago, people (1. make) /made/ their own clothes. They (2. have, not) _____ machines for making clothes. There (3. be, not) _____ any clothing factories. People (4. tear) _____ homemade clothes that were sewn by hand. Today, very few people (5. make) _____ their own clothes. Clothing (6. come) _____ ready-made from factories. People (7. buy) _____ almost all their clothes from stores. The modern clothing industry (8. be) _____ international. As a result, people from different countries often (9. wear) _____ similar clothes. For example, people in many different countries throughout the world (10. wear) _____ jeans and t-shirts. However, some regional differences in clothing still (11. exist) _____ for instance, people of the Arabian deserts (12. wear) _____ loose, flowing lobes to protect themselves from the heat of the sun. In parts of Northern Europe, fur hats (13. be) _____ common in the winter. In the future, there (14. be, probably) _____ fewer and fewer differences in clothing. People throughout the world (15. wear) _____ clothes from the same factories. (16. We all, dress) _____ in the future? TV shows and movies about the future often (17. show) _____ everybody in a uniform of some kind. What (18. you, think) _____? Number 18