Question
Download Solution PDFयदि \(\frac{cos\,\alpha}{sin\,β}\) = 10 और \(\frac{cos\,\alpha}{cos\,β}\) = 11, तो cos2β का मान क्या है?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिया गया है:
\(\frac{cos\,α}{sin\,β}\) = 10 , \(\frac{cos\,α}{cos\,β}\) = 11
गणना:
10 sinβ = 11 cosβ
⇒ tanβ = 11/10
cos2β = 100/221
सही विकल्प 2 है।
Last updated on Jul 10, 2025
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