I: The range of the function f(x)=cos[x] for −π2<x<π2 is {1,cos1,cos2}. II: Every periodic function is one-one function.
only I is true
only II is true
both I and II are true
neither I nor II are true
A
only II is true
B
neither I nor II are true
C
only I is true
D
both I and II are true
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Solution
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From graph you can find the range & also justify that every periodic function is not one-one function.
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