tan150 derajat+cos60derajatpertan 315

Kelas 10 Matematika
Bab Trigonometri

(tan 150° + cos 60°) / tan 315°
= (tan (180° - 30°) + 1/2) / tan (360° - 45°)
= (- tan 30° + 1/2) / (- tan 45°)
= (-1/3 √3 + 1/2) / (-1)
= 1/3 √3 - 1/2
= 2/6 √3 - 3/6
= (2√3 - 3)/6