Question

kerjakan soal no 7 dan 8 , (100 poin)​

Answer 1

Verified answer

trigonometri

segitiga siku-siku

x = sisi samping sudut

y = sisi depan sudut

r = sisi miring

no. 7

teta = a

cos a = x/r = 5/6

sec a = 1/cos a = 6/5

y = √(r² - x²)

y = √(6² - 5²)

y = √11

sin a = y/r = 1/6 √11

tan a = y/x = 1/5 √11

•

no. 8

a di kuadran IV

sin a = -1/2

a = 360° - 30° = 330°

cos a = cos 330° = cos 30° = 1/2 √3

tan a = - tan 30° = -1/3 √3

cosec a = 1/sin a = -2

sec a = 1/cos a = 2/3 √3

cotan a = 1/tan a = - √3