Question

P : 8 centimeter.
R : 13 centimeter.
Q : 15 centimeter.
Nilai sinus Q : .......................................
a. 4/14 akar 3 d. 13/15
b. 4/15 akar 3 e. 8/15
c. 8/15 akar 3

Answer 1

Cos Q = (p^2 + r^2 - q^2)/(2pr)
Cos Q = (64 + 169 - 225)/(2.8.13)
Cos Q = 8/(2.8.13)
Cos Q = 1/26 = sa/mi
de = √(26^2 - 1^2) = √(√676-1) = √675 = 15√3
Sin Q = de/mi = 15√3 / 26