The largest positive solution of \( 1+\sin ^{4} x=\cos ^{2} 3 x \) in \( [-5 \pi / 2,5 \pi / 2] ...

The largest positive solution of \( 1+\sin ^{4} x=\cos ^{2} 3 x \) in \( [-5 \pi / 2,5 \pi / 2] \), is (A) \( \pi \) (B) \( 2 \pi \) (C) \( \frac{5 \pi}{2} \) (D) none of these 📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live

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