Trigonometric Sums And Summation Formulas Publication Trend The graph below shows the total number of publications each year in Trigonometric Sums And Summation Formulas.

Interestingly enough, the trigonometric functions that define those relationships are also closely tied to circles. Needless to say, this makes trig one of the hardest topics in math for students ...

At an American Mathematical Society meeting, high school students presented a proof of the Pythagorean theorem that used trigonometry—an approach that some once considered impossible ...