Question
Download Solution PDFsin2 θ − 3 sin θ + 2 = 0 எனில், θ (0° ≤ θ ≤ 90°) இன் மதிப்பைக் கண்டறியவும் .
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFகொடுக்கப்பட்டது:
sin2 θ − 3 sin θ + 2 = 0.
பயன்படுத்தப்பட்ட கருத்து:
1. -1 ≤ sin θ ≤ 1.
2. sin 90° = 1
கணக்கீடு:
sin2 θ − 3 sin θ + 2 = 0
⇒ sin2 θ − 2 sin θ - sin θ + 2 = 0
⇒ sin θ(sin θ - 2) - 1(sin θ - 2) = 0
⇒ (sin θ - 2) (sin θ - 1) = 0
So, sin θ = 1 (∵ sin θ ≠ 2)
⇒ sin θ = sin 90°
⇒ θ = 90°
∴ θ இன் மதிப்பு 90° ஆகும்.
Last updated on Jul 17, 2025
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