state gov TSPSC Forest Beat Officer (ఫారెస్ట్ బీట్ ఆఫీసర్) Mock Test 2023 Quantitative Aptitude Algebra Linear Equation in 1 Variable
If for real x, the equation x + \(\rm\frac{1}{x}\) = 2 cos θ holds, then cos θ is equal to
1
0
2
±1
3
\(\pm \frac{\sqrt{3}}{2}\)
4
\(\pm \frac{1}{\sqrt{2}}\)