railway DFCCIL MTS 2025 Mock Test Series Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
If secθ + tanθ = 2 +√5 and θ is an acute angle, then the value of sin θ is:
1
\(\frac{{\sqrt 5 }}{5}\)
2
\(\frac{{2\sqrt 5 }}{5}\)
3
\(\frac{{3}}{5}\)
4
\(\frac{{1 }}{5}\)