Question
Download Solution PDFcos (3015°) का मान ज्ञात कीजिए।
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFअवधारणा:
cos (2nπ ± θ) = cos θ
cos (90 + θ) = -sin θ
गणना:
दिया हुआ: cos (3015°)
⇒ cos (3015°)
= cos (360° × 8° + 135°)
= cos (135°) [∵ cos (2nπ ± θ) = cos θ ]
= cos (90° + 45°)
= -sin 45° [∵ cos (90 + θ) = - sin θ]
= -1/√2
Last updated on Jun 20, 2025
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