railway UPMRC SCTO 2024 Mock Test Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
If sin A = \(\frac{3}{4}\), find the value of cos A.
1
\(\frac{4}{3}\)
2
\(\frac{\sqrt{7}}{4}\)
3
\(\frac{4}{\sqrt{7}}\)
4
\(\frac{3}{\sqrt{7}}\)