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Functions · 2021 · 27 Jul · Shift 2

1 Mathematics questions from this JEE Main paper
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Functions · 2021 · 27 Jul · Shift 2

1 Mathematics questions from this JEE Main paper

  1. Q25.Let f : R → R be defined as f(x+y)+f(x−y)=2f(x)f(y),f(21​)=−1. Then, the value of k=1∑20​sin(k)sin(k+f(k))1​ is equal to :
    Mathematics · Functions · MCQ