JEE MATHEMATICS MCQ: INCREASING & DECREASING

1 Easy

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Analyzing +4 | -1

The function

f(x)=\sin ^4 x+\cos ^4 x

increasing, if

View answer and explanation

Correct option: B

\pi /4 < x < 3\pi /8

Option B (

\pi /4 < x < 3\pi /8

) is correct because the derivative of the function is positive in this interval, indicating an increasing function.

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