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JEE Mains · Maths · STD 11 - Trigonometrical equations

माना एक समकोण त्रिभुज में, सबसे छोटा कोण \(\theta\) है। यदि इसकी भुजाओं के व्युत्क्रम भी एक एकसमकोण त्रिभुज बनाते है, तो \(\sin \theta\) बराबर है

  1. A \(\frac{\sqrt{5}+1}{4}\)
  2. B \(\frac{\sqrt{5}-1}{2}\)
  3. C \(\frac{\sqrt{2}-1}{2}\)
  4. D \(\frac{\sqrt{5}-1}{4}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\frac{\sqrt{5}-1}{2}\)

Step-by-step Solution

Detailed explanation

\(\,<\,A=\theta\) \(\,<\,B=90^{\circ}-\theta\) \(c^{2}=a^{2}+b^{2}\) \(\frac{1}{a} \rightarrow\) largest side \(\therefore \frac{1}{a^{2}}=\frac{1}{b^{2}}+\frac{1}{c^{2}}\) \(\frac{\mathrm{b}^{2} \mathrm{c}^{2}}{\mathrm{a}^{2}}=\mathrm{b}^{2}+\mathrm{c}^{2}\) Use…
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