please put me out of my misery and give some hints as to how to complete this one:
Given that n∑k=1xk<π2
Where 0≤xi≤π2 for i=1,2,3,4,…,n
Prove by mathematical induction that for n=1,2,3,… that:
tan(x1+…+xn)≥tanx1+…+tanxn
I have injection f:A→B and I want to get bijection. Can I just resting codomain to f(A)? I know that every function i...
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