Question
Download Solution PDFयदि sin Y = x है, तो cos 2Y (जहाँ 0 ≤ Y ≤ 90°) का मान क्या होगा?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिया गया:
sin Y = x
प्रयुक्त सूत्र:
cos 2Y = 1 - 2sin2 Y
गणना:
प्रश्न के अनुसार,
⇒ cos 2Y = 1 - 2sin2 Y
⇒ cos 2Y = 1 - 2(sin Y)2
⇒ cos 2Y = 1 - 2(x)2
∴ cos 2Y का मान 1 - 2(x)2 है।
Last updated on Jul 17, 2025
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