जर 3 cos2θ + 1 = 4 sin θ, 0° < θ < 90° असेल, तर sec2θ चे मूल्य काढा:

1
\(\frac{9}{5}\)
2
\(\frac{4}{5}\)
3
\(\frac{5}{4}\)
4
\(\frac{5}{9}\)

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