Question
Download Solution PDFcos 2A cos 2B + sin2 (A - B) - sin2 (A + B) இன் மதிப்பைக் கண்டறியவும்
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFகொடுக்கப்பட்டது:
cos 2A cos 2B + sin 2 (A - B) - sin 2 (A + B)
பயன்படுத்தப்பட்ட கருத்து:
cos (a + b) = cos a cos b - sin a sin b
sin2a - sin2b = sin(a + b) sin(a - b)
கணக்கீடு:
cos 2A cos 2B + sin 2 (A - B) - sin 2 (A + B)
⇒ cos 2A cos 2B - sin 2 (A + B) + sin 2 (A - B)
⇒ cos 2A cos 2B - sin(A + B + A - B) sin(A + B - A + B)
⇒ cos 2A cos 2B - sin(A + A) sin(B + B)
⇒ cos 2A cos 2B - sin 2A sin 2B
⇒ cos (2A + 2B)
∴ தேவையான பதில் cos (2A + 2B).
Last updated on Jul 15, 2025
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