यदि \(\cot x=3\), तो \(\cosec^2 x\) का मान क्या है?
If \(\cot x=3\), what is the value of \(\cosec^2 x\)?
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B. 10
Simple Explanation
पहचान \,\(\cosec^2 x=1+\cot^2 x\) का प्रयोग करें। यहाँ \(\cot x=3\), अतः \(\cot^2 x=9\)। इसलिए \(\cosec^2 x=1+9=10\)। विकल्प 9 केवल \(\cot^2 x\) का मान है, \(\cosec^2 x\) का नहीं। परीक्षा टिप: \(1+\cot^2 x=\cosec^2 x\) पहचान में 1 जोड़ना न भूलें। / Use the identity \(\cosec^2 x=1+\cot^2 x\). Given \(\cot x=3\), we get \(\cot^2 x=9\). Therefore, \(\cosec^2 x=1+9=10\). Option 9 is only the value of \(\cot^2 x\), not of \(\cosec^2 x\). Exam tip: In the identity \(1+\cot^2 x=\cosec^2 x\), do not forget to add 1.
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