Akasapu K.

asked • 01/09/17

can u help me out, i'm stuck with it

If  f(x) = sin^4(x)cos^4(x). Then f is increasing function in the interval? 

2 Answers By Expert Tutors

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Arturo O. answered • 01/09/17

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5.0 (66)

Experienced Physics Teacher for Physics Tutoring

Michael J.

Your solution makes it more simple to solve the problem and produces less work.
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01/09/17

Arturo O.

Initially I tried taking the derivative, as in your solution, and I got bogged down trying to find the zeros.  Then I decided to try a change of variable, and recalled that useful trig identity.  In any case, it is good for the student to see different ways of solving the same problem, i.e. a more analytical way, as in your solution, and a more intuitive way, using the trig identity.  
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01/09/17

Michael J. answered • 01/09/17

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5 (5)

Mastery of Limits, Derivatives, and Integration Techniques

Michael J.

Again with the negative votes for correct answers?
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01/09/17

Arturo O.

The epidemic just goes on.
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01/09/17

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