ComedkTrigonometric EquationsCOMEDK 2025 Evening ShiftMCQ+1 / -02025If $\sin x+\sin ^2 x=1$ then $\cos ^8 x+2 \cos ^6 x+\cos ^4 x$ is equal to :A0B1C$-1$D2Check AnswerClear SelectionReveal AnswerShow Explanation
