Wb Jee
Complex Numbers
WB JEE 2011
MCQ+1 / -0.252011
If \(x + {1 \over x} = 2\cos \theta\), then for any integer n, \({x^n} + {1 \over {{x^n}}} =\)
Wb Jee
WB JEE 2011
If \(x + {1 \over x} = 2\cos \theta\), then for any integer n, \({x^n} + {1 \over {{x^n}}} =\)