What does “Bijective functions” actually mean in Relations, Functions & Inverse Trigonometry, and why does it matter for JEE?
a function has an inverse only if it is bijective — both one-one (injective) and onto (surjective).
In simple words: a function has an inverse only if it is bijective — both one-one (injective) and onto (surjective). Getting Bijective functions clear matters because JEE questions on Relations, Functions & Inverse Trigonometry usually test this idea directly, not just a formula you memorised.
Key point
Bijective functions
Common mistake
trying to invert a function that maps two inputs to the same output.
Memory tip
only one-one AND onto functions can be reversed.
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