" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
TrigonometriKelas X
Jika θ adalah sudut di kuadran - 4 yang memenuhi tan²θ = 4 sin²θ , maka sin θ + cos θ = ...
Jawab :
tan²θ = 4 sin²θ
sin²θ / cos²θ = 4 sin² θ
cos²θ = ¼
cos θ = + ½ (kuadran 4)
θ = (360° - 60°)
θ = 300°
sin 300° = -sin 60° = - ½√3
sin θ + cos θ = -½√3 + ½ = ½(1 - √3) ... [B]
Ya , kamu benar