यदि \( \theta=\frac{5\pi}{6} \) है तो \(3\theta\) किस अक्ष या चतुर्थांश में होगा?
If \( \theta=\frac{5\pi}{6} \), on which axis or quadrant will \(3\theta\) lie?
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Correct Answer
D. ऋणात्मक (y)-अक्षNegative (y)-axis
Concept
\(3\theta=\frac{15\pi}{6}=\frac{5\pi}{2}\), and its principal angle is \( \frac{\pi}{2} \). Hence the terminal side lies on the positive (y)-axis.
Why this answer is correct
The correct answer is D. ऋणात्मक (y)-अक्ष / Negative (y)-axis. \(3\theta=\frac{15\pi}{6}=\frac{5\pi}{2}\), and its principal angle is \( \frac{\pi}{2} \). Hence the terminal side lies on the positive (y)-axis.
Exam Tip
\(3\theta=\frac{15\pi}{6}=\frac{5\pi}{2}\) और इसका मुख्य कोण \( \frac{\pi}{2} \) है। इसलिए अंतिम भुजा धनात्मक (y)-अक्ष पर है।
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