nilai sin 120° + sin 150° per cos 330° + cos 240° =

Bab Trigonometri
Matematika SMA Kelas X

(sin 120° + sin 150°) / (cos 330° + cos 240°)
= (1/2 √3 + 1/2) / (1/2 √3 - 1/2)
= (1/2 (√3 + 1)) / (1/2 (√3 - 1))
*** coret 1/2 ***
= (√3 + 1) / (√3 - 1)
= (√3 + 1) (√3 + 1) / (√3² - 1²)
= (3 + 2√3 + 1) / (3 - 1)
= (4 + 2√3) / 2
= 2 + √3

https://id-static.z-dn.net/files/d4f/c0c44eba9a504f90b25754a14c6f22eb.jpg Maaf jika ada yang salah....