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JEE Mains · Maths · STD 11 - 9. straight line

यदि रेखाओं \(\mathrm{x} \cos \theta+\mathrm{y} \sin \theta=7, \theta \in\left(0, \frac{\pi}{2}\right)\) के निर्देशांक अक्षो के बीच रेखाखंडो के मध्य बिंदुओं द्वारा बने वक्र पर एक बिंदु \(\left(\alpha, \frac{7 \sqrt{3}}{3}\right)\) है, तो \(\alpha\) बराबर है :

  1. A \(7\)
  2. B \(-7\)
  3. C \(-7 \sqrt{3}\)
  4. D \(7 \sqrt{3}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(7\)

Step-by-step Solution

Detailed explanation

\(\operatorname{pt}\left(\alpha, \frac{7 \sqrt{3}}{3}\right)\) \(x -\text { intercept }=\frac{7}{\cos \theta}\) \(y -\text { intercept }=\frac{7}{\sin \theta}\) \(A:\left(\frac{7}{\cos \theta}, 0\right) B :\left(0, \frac{7}{\sin \theta}\right)\) Locus of mid pt \(M :( h , k )\)…
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