Question
Download Solution PDFcos 4x இன் மதிப்பு என்ன?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFகணக்கீடு:
Cos 4x = cos 2(2x)
⇒ Cos 2x = 2 cos2x - 1
⇒ Cos 2(2x) = 2 cos2 (2x) - 1
⇒ 2[1 - sin2 (2x)] - 1
⇒ 2[1 - (2sin x cos x)2] - 1 (∵ sin2x = 2sin x cos x)
⇒ 2[1 - 4 sin2x cos2x] - 1
⇒ 2 - 8 sin2x cos2x - 1
⇒ 1 - 8sin2x cos2xLast updated on Jun 26, 2025
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