Question
Download Solution PDFcos 120° का सटीक मान ज्ञात कीजिए।
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFप्रयुक्त अवधारणा:
Cosθ = sin (90° - θ)
दूसरे चतुर्थांश में cos का मान ऋणात्मक होता है।
गणना:
Cos120° = cos (90° + 30°)
⇒ - sin30° = -0.5
∴ सही विकल्प 1 है।
Last updated on Jul 15, 2025
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