In this post, with the help of A-Student, I have proved the two trigonometrical formulae of Euler. In this thread, I will prove 2 more general formlae found in his paper "Subsidium Calculi Sinuum" (Contribution to the calculation of sine) by Euler.
In this post, with the help of A-Student, I have proved the two trigonometrical formulae of Euler. In this thread, I will prove 2 more general formlae found in his paper "Subsidium Calculi Sinuum" (Contribution to the calculation of sine) by Euler.
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