Question
Download Solution PDFयदि sin 2A = 2 sin A है, तो A = ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिया गया है:
sin 2A = 2 sin A
प्रयुक्त सूत्र:
द्वि कोण सर्वसमिका का उपयोग करने पर: sin 2A = 2 sin A cos A
गणना:
sin 2A = 2 sin A
⇒ 2 sin A cos A = 2 sin A
⇒ 2 sin A cos A - 2 sin A = 0
⇒ 2 sin A (cos A - 1) = 0
चूँकि sin A 0 नहीं हो सकता है:
⇒ cos A - 1 = 0
⇒ cos A = 1
⇒ A = 0º
∴ सही उत्तर विकल्प (1) है।
Last updated on Mar 21, 2025
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