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

अन्तराल \((0, \pi)\) में \(\theta\) के सभी संभावित मूल्यों का समुच्चय, जिसके लिए दोनों बिन्दु \((1,2)\) तथा \((\sin \theta, \cos \theta)\) सरल रेखा \(x + y =1\) के एक ही तरफ स्थित है

  1. A \(\left(0, \frac{\pi}{4}\right)\)
  2. B \(\left(0, \frac{3 \pi}{4}\right)\)
  3. C \(\left(\frac{\pi}{4}, \frac{3 \pi}{4}\right)\)
  4. D \(\left(0, \frac{\pi}{2}\right)\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\left(0, \frac{\pi}{2}\right)\)

Step-by-step Solution

Detailed explanation

Given that both points (1,2)\(\&(\sin \theta, \cos \theta)\) lie on same side of the line \(x+y-1=0\) So, \((\) Put \((1,2)\) in given line \()(\operatorname{Put}(\sin \theta, \cos \theta)\) in given line\()>0\) \(\Rightarrow(1+2-1)(\sin \theta+\cos \theta-1)>0\)…
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