कौन सा व्यंजक वास्तविक संख्या नहीं देता?
Which expression does not give a real number?
Explanation opens after your attempt
Correct Answer
A. (\cos^{-1}\left\(\frac{7}{6}\right\))
Concept
The expression \(\cos^{-1}x\) is real only for \(x\in[-1,1]\), and \(\frac{7}{6}>1\). Hence it will not give a real value.
Why this answer is correct
The correct answer is A. (\cos^{-1}\left\(\frac{7}{6}\right\)). The expression \(\cos^{-1}x\) is real only for \(x\in[-1,1]\), and \(\frac{7}{6}>1\). Hence it will not give a real value.
Exam Tip
\(\cos^{-1}x\) केवल \(x\in[-1,1]\) पर वास्तविक है और \(\frac{7}{6}>1\) है। इसलिए यह वास्तविक मान नहीं देगा।
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