Proofs
Pro Problems > Math > Logic > ProofsFeatured Pro Problems

There are infinitely many angles between 0 and 90 degrees for which sine and cosine values are both rational. Create a proof.

Use a proof by induction to predict the value of the sum of the first n perfect squares.

Prove by contradiction that the harmonic mean of two positive numbers lies between the two numbers

Do a proof by induction to show what the sum of the first n positive integers is.
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