railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
If tan θ = \(x - \frac{1}{4x}\), then sec θ - tan θ is equal to:
1
\(-2x \) or \(-\frac{1}{2x}\)
2
\(2x\) or \(- \frac{1}{2x}\)
3
\(2x \) or \(\frac{1}{2x}\)
4
\(- 2x\) or \(\frac{1}{2x}\)