Class 11Mathematics1 Complex Numbers and Quadratic Equations: Complex NumbersDe Moivre's theorem and Roots of unity
DifficultFor any real number $n \in \mathbb{R}$,$(\cosh x + \sinh x)^n =$
- A$\cosh nx - \sinh nx$
- B$\cosh nx + \sinh nx$
- C$\cosh^2 nx + 2 \sinh nx$
- D$\cosh nx - \sinh nx$
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View SolutionIf $\omega$ is a complex cube root of unity,then $\left(1-\omega+\omega^2\right)^6+\left(1-\omega^2+\omega\right)^6=$
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