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JEE Mains · Maths · STD 11 - Trigonometrical equations

माना \(\frac{\sin A }{\sin B }=\frac{\sin ( A - C )}{\sin ( C - B )}\) है, जहॉं \(A , B , C\) त्रिभुज \(ABC\) के कोण हैं। यदि इन कोणों के सम्मुख भुजाओं की लंबाईयाँ क्रमशः \(a , b , c\) है तो

  1. A \(b^{2}-a^{2}=a^{2}+c^{2}\)
  2. B \(b^{2}, c^{2}, a^{2}\) are in \(A.P.\)
  3. C \(\mathrm{c}^{2}, \mathrm{a}^{2}, \mathrm{~b}^{2}\) are in \(A.P.\)
  4. D \(a^{2}, b^{2}, c^{2}\) are in \(A.P.\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(b^{2}, c^{2}, a^{2}\) are in \(A.P.\)

Step-by-step Solution

Detailed explanation

\(\frac{\sin A}{\sin B}=\frac{\sin (A-C)}{\sin (C-B)}\) As \(A, B, C\) are angles of triangle \(A+B+C=\pi\) \(A=\pi-(B+C)\) So, \(\sin A=\sin (B+C) \ldots(1)\) \(\text { Similarly } \sin B=\sin (A+C) \ldots(2)\) \(\text { From (1) and (2) }\)…
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