Mathematics Differential Calculus Applications of Derivatives

 f(x) = sin4 x + cos4 x అనే ప్రమేయం ఏకరీతీయంగా ఎప్పుడు పెరుగుతుంది

1
\(0 < x < \frac{\pi }{8}\)
2
\(\frac{\pi }{4} < x < \frac{{\pi }}{2}\)
3
\(\frac{{3\pi }}{4} < x < \frac{{5\pi }}{8}\)
4
\(\frac{{5\pi }}{8} < x < \frac{{3\pi }}{4}\)

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