Question
Download Solution PDF3 tan 20°.tan 45°.tan 70° এর মান কত ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFপ্রদত্ত:
3 tan 20°.tan 45°.tan 70°
অনুসৃত সূত্র:
tan θ = cot (90° - θ)
tan θ × cot θ = 1
tan 45° = 1
গণনা:
3 tan 20°.tan 45°.tan 70°
⇒ 3 tan 20°.tan 45°. cot (90° - 70°) ..........tan θ = cot (90° - θ) ব্যাবহার করে
⇒ 3 tan 20°.tan 45°. cot (20°)
⇒ 3 × tan 45°
⇒ 3 × 1
3
∴ বিকল্প 2 হল সঠিক উত্তর।
Last updated on Jul 22, 2025
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