Report, edit, etc...Posted by BeeR_KeG on 2005-05-22 at 19:55:35
This formula sure made my Trigonometry exam much easier. I didn't have to use those lame double angle, half angle or triple angle formulas to find the sine of an angle.
I just convert it to radians by using this:
Angle = pi/180
To be able to use this formula you need to know how to properly use sigma notation, factorials and negative exponents. You need to know lots of Pre-Calculus.
I just convert it to radians by using this:
Angle = pi/180
To be able to use this formula you need to know how to properly use sigma notation, factorials and negative exponents. You need to know lots of Pre-Calculus.
Report, edit, etc...Posted by CheeZe on 2005-05-22 at 20:11:50
Umm... yeah, there is a sin button on my calculator.
Besides, cool people know:
sin x = square root of (1 - cos^2(x))
And that's all you'll need.
Better looking picture:
Besides, cool people know:
sin x = square root of (1 - cos^2(x))
And that's all you'll need.
Better looking picture:
Report, edit, etc...Posted by BeeR_KeG on 2005-05-23 at 14:48:53
QUOTE
sin x = square root of (1 - cos^2(x))
That formula doesn't really fix anything. You will still have to find the cosine using those trigonometric methods.
Report, edit, etc...Posted by Staredit.Net Essence on 2005-05-23 at 15:20:19
They teach you that formulae, but like 2 years later, in more advanced maths.
My teacher said it was more "worth" it to go the long way, and learn the hard way, rather than going this way...
My teacher said it was more "worth" it to go the long way, and learn the hard way, rather than going this way...
Report, edit, etc...Posted by CheeZe on 2005-05-23 at 17:59:32
QUOTE(BeeR_KeG @ May 23 2005, 01:48 PM)
That formula doesn't really fix anything. You will still have to find the cosine using those trigonometric methods.
[right][snapback]213765[/snapback][/right]
[right][snapback]213765[/snapback][/right]
True, and that is why we all know cos(x) = square root of (1 - sin^2(x))
=)
Report, edit, etc...Posted by O)FaRTy1billion on 2005-05-23 at 19:22:31
And that is why we know, just use your calculator! W00t! I'm a genious! (my calc has all this crap in it 
I have lots of calcs)
I have lots of calcs)Report, edit, etc...Posted by BeeR_KeG on 2005-05-23 at 20:57:51
In exman, you usually can't use a graphic or scientific calculator because of that.
Thats why this ecuation was created, because there were no calculators at the time.
Thats why this ecuation was created, because there were no calculators at the time.