Between any two real roots of the equation

MATHEMATICS · Single correct · A Level · Mathematics · Differentiation · Differentiation

Problem

Between any two real roots of the equation exsin⁡x−1=0e^x\sin x-1=0, the equation excos⁡x+1=0e^x\cos x+1=0 has (1) At least one root. (2) At most one root. (3) Exactly one root. (4) No root.

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