First we have proportional parts of all numbers up to 100; then on one page three-place logarithms of numbers and of the six ... trigonometric functions, inverse trigonometric functions (a new ...

Interpolated Six-Place Tables of the Logarithms of Numbers and the Natural and Logarithmic Trigonometric Functions. Edited by H. W. Marsh. Pp. xii + 155. (New York: John Wiley and Sons ...

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 ...