how do you find sin theta and cosine theta of angles?
ex. Find the sine theta and cosine theta of 150 degrees as well as the degrees in radians?
trigonometry - drwls, Monday, February 4, 2008 at 8:26pm
For the sine and cosine functions, you need a calculator, a slide rule (if there is one in the attic) or a table of trigonometric functions. There are also web sites you can use.
Sin 150 degrees = 1/2, exactly
cos 150 degrees = -(sqrt 3)/2
You can prove that with geometry, but other angles usually require a calculator or table.
To convert an angle in degrees to radians, multiply it by pi/180.
trigonometry - mariya, Monday, February 4, 2008 at 8:31pm
thanks we have a table but we have to fill it out ourselves and i wasn't sure how to do it.