Continuity and DifferentiabilityHard

Question

If y = | cosx | + | sinx |, then at x = is -

Options

A.
B.0
C.
D.None of these

Solution

y = | cosx | + | sinx | at x = 2π/3
y = - cosx + sinx
= sinx + cosx
x = 2π/3 = (√3 - 1)

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