Question
Download Solution PDFনীচের রাশিটির মান নির্ণয় করুন:
12(sin4 θ + cos4 θ) + 18(sin6 θ + cos6 θ) + 78 sin2 θ cos2 θ
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFঅনুসৃত ধারণা:
sin 90° = 1, cos 90° = 0
গণনা:
θ = 90° মান বসিয়ে পাই,
12(sin4 θ + cos4 θ) + 18(sin6 θ + cos6 θ) + 78 sin2 θ cos2 θ
⇒ 12(sin4 90° + cos4 90°) + 18(sin6 90° + cos6 90°) + 78 sin2 90° cos2 90°
⇒ 12 × 1 + 18 × 1 = 30
∴ সঠিক উত্তর হল 1
Last updated on Jul 17, 2025
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