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How where all the possible tangents, cosines, and sines of angles found?
how do they find the sine of all possible anglesHi assuredlonewo
What do you mean with this question. I understand it in three ways:
- How did they come up with the concept of sine
- how did they find the sine of a specific nice angle, say 45°
- how do they find the sine of all possible angles
Which of these (if any) do you mean?
Personal electronic calculators that could do trig functions became available in about the 1972-1975 period. When I was an undergraduate, my roommate had one of the early Texas Instruments calculators which could not do trig functions. This was about 1973. Shortly after I started graduate school in 1975, I bought my first calculator, a Hewlett-Packard which could do trig functions. Before that, I used a book of tables like the CRC book.it was not uncommon, even into the 20th century, for most people using sines to reference tabulated values.