Question
Download Solution PDFsin θ = \(1 \over 2\) என்றால், (3cos θ - 4 cos3 θ) இன் மதிப்பு என்ன?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFகொடுக்கப்பட்டது:
sin θ = \(1 \over 2\)
பயன்படுத்தப்பட்ட கருத்து:
கணக்கீடு:
sin θ = \(1 \over 2\)
⇒ sinθ = sin 30°
எனவே, θ = 30°
3cos θ - 4 cos3 θ
⇒ 3 × \(\sqrt3 \over 2\) - 4 × \(3\sqrt3 \over 8\)
⇒ \({3\sqrt3 \over 2} - \frac{3\sqrt3}{2}\)
⇒ 0.
∴ தேவையான பதில் 0.
Last updated on Jun 13, 2025
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