RD Sharma - Mathematics (Volume 1)

Book: RD Sharma - Mathematics (Volume 1)

Chapter: 17. Increasing and Decreasing Functions

Subject: Maths - Class 12th

Q. No. 31 of Exercise 17.2

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31

Prove that the function f given by f(x) = log cos x is strictly increasing on (–π/2, 0) and strictly decreasing on (0, π/2) ?

we have,



In Interval (0,), tan x > 0




In interval (), tan x < 0



31

Chapter Exercises

More Exercise Questions

26

Find the interval in which is increasing or decreasing ?