ok, so what about deriving the other ratios from knowing that sine=0.642?

I did this last year, but GUESS WHAT? I have no textbook this year and my teacher is... is... well.... no comment.

Guest Oct 13, 2017

#1**0 **

Once you know the sine of an angle, then you can get all the other functions using this famous identity:

Sin^2(x) + Cos^2(x) =1. To see how, go online to this link:** https://en.wikipedia.org/wiki/Sine**

Go down the page to "Other Trigonometric Functions" and look at the first column.

Guest Oct 13, 2017

edited by
Guest
Oct 13, 2017