Which of the following is/are correct ?...

Which of the following is/are correct ?

Between any two root of `e^(x)cos x=1,` there exists at least one root of tan x = 1.

Between any two roots of `e^(x)sin x=1,` there exists at least one root of tan x= -1.

Between any two roots of `e^(x)cos x=1,` there exists at least one root of `e^(x)sin x=1.`

Between any two roots of `e^(x)sin x=1,` then exists at least one root of `e^(x) cos x=1.`

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The correct Answer is:

A, B, C

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