Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Let f: 
→ R be given by f(x) = (log(sec x + tanx)) 3 . Then
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(a,b,c)
Sol. (i) f(–x) = –f(x) so it is odd function
(ii) f'(x) = 3(log(secx + tanx)) 2 
(secx tanx + sec 2 x) > 0
(iii) Range of f(x) is R as f 
⇒ – ∞ ⇒ f 
⇒ ∞
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