BANK EPFO SSA Mock Test 2023 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

If \(\rm \frac{\sin θ+\cos θ}{\sin θ-\cos θ}=3\), then the value of sin4 θ - cos4 θ is equal to:

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