If 7 sin4 θ + 9 cos4 θ + 42 sin2 θ = 16, 0 < θ < \frac{\pi }{2}, then what is tan θ equal to ?

UPSC CDS 2 2023 Math Paper

Question : 72 of 100

Marks: +1, -0

If 7 sin4 θ + 9 cos4 θ + 42 sin2 θ = 16, 0 < θ < ‌

π‌

, then what is tan θ equal to ?

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