Question
Download Solution PDFcot (A - B) =
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFগণনা:
cot (A - B) =
⇒ Cot15° = Cot(45° - 30°)
⇒ Cot(45° - 30°) = Cot45°Cot30° + 1/Cot30° - Cot45°
⇒ 1 × √3 + 1/√3 - 1
⇒ √3 + 1/√3 - 1
⇒ √3 + 1/√3 - 1 × √3 + 1/√3 + 1
⇒ (√3 + 1)2/2
⇒ (3 + 1 + 2√3)/2
⇒ (2√3 + 4)/2
⇒ √3 + 2
∴ সঠিক উত্তর হল √3 + 2
Last updated on Jul 15, 2025
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