Discuss Forum

1. θ

  • A. 30°
  • B. 30°
  • C. 30°
  • D. 30°

Answer: Option D

Explanation:

আমরা জানি,
  sin 30 = 1/2
যেহেতু, θসূক্ষকোণ এবং sin(θ + 18°) = 1/2
অর্থাৎ, θ + 18° = 30°
∴ θ = 12° (ans)

Post your comments here:

Name:
Mobile:
Email:(Optional)

» Your comments will be displayed only after manual approval.