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  1. Prove interesting trigonometric identities

    Prove interesting trigonometric identities

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  2. sin 15 and sin 18 and cos 36: Pure geometric way

    sin 15 and sin 18 and cos 36: Pure geometric way

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  4. Probability solution: A Total of n balls, number of 1 through n...

    Probability solution: A Total of n balls, number of 1 through n...

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  5. index 2 subgroup must be a normal subgroup

    index 2 subgroup must be a normal subgroup

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  7. Mathematical induction divide exercise

    Mathematical induction divide exercise

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  8. Linear map fixed point theorem

    Linear map fixed point theorem

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  10. The existence proof of eigenvectors and eigenvalues

    The existence proof of eigenvectors and eigenvalues

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  11. Integral of 1/(x^3-1) from integral of 1/(x^3+1)

    Integral of 1/(x^3-1) from integral of 1/(x^3+1)

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  12. Integral of x^4+1 step by step

    Integral of x^4+1 step by step

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  14. Integral of 1/(1+x^2)^2 (substitution)

    Integral of 1/(1+x^2)^2 (substitution)

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  15. Very funny math question solve x for x^x^n=n

    Very funny math question solve x for x^x^n=n

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  17. Simple Group of order 60 must be A5

    Simple Group of order 60 must be A5

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  19. Can you solve the following integral? integral of 1/(1+x^phi)^phi from 0 to infty

    Can you solve the following integral? integral of 1/(1+x^phi)^phi from 0 to infty

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  20. zeta function at zero, at 1, at 3, particular values

    zeta function at zero, at 1, at 3, particular values

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  21. Complex contour integral: e^{-x}cos(x)/sqrt(x), e^{-x}sin(x)/sqrt(x) from 0 to infinity

    Complex contour integral: e^{-x}cos(x)/sqrt(x), e^{-x}sin(x)/sqrt(x) from 0 to infinity

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  22. Factorize a^3 + b^3 + c^3 - 3abc

    Factorize a^3 + b^3 + c^3 - 3abc

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  23. Nested radical 2: Nested radical of Ramanujan

    Nested radical 2: Nested radical of Ramanujan

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  24. Two ways: Integral of 1/(x^2+1)^2 from 0 to infinity

    Two ways: Integral of 1/(x^2+1)^2 from 0 to infinity

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  25. Nested radical1: Nested radical of Ramanujan

    Nested radical1: Nested radical of Ramanujan

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