× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
t
7
m
6
k
6
F
5
j
5
t
5
j
5
G
5
f
5
a
5
d
5
c
5
Home Q & A Board Science-Related Homework Help Mathematics
New Topic  
micawake micawake
wrote...
Posts: 18
Rep: 1 0
10 years ago
How do I output my answer as a fraction in Mathematica.

For example, what is the fraction form of 0.76176?

I'm actually trying to figure out what Sine[Sqrt[3]/2] is as a fraction.
No, I'm not interested in the ArcSine. I want Sine[(sqrt(3))/2] = ? as a fraction.
Read 427 times
6 Replies

Related Topics

Replies
wrote...
#1
10 years ago
Hmmm get an expensive calculator then figure out the decimal then hit conver from decimal to fraction
wrote...
#2
10 years ago
If you know the unit circle it is a fraction which is pi/3 or 4pi/3
wrote...
#3
10 years ago
sqrt(3)/2 IS a fraction....

Now, are you sure you want sin(sqrt(3)/2)?
If so, you use radians, rather than degrees. and you get something like 0.69441

or do you want to find x in sin(x) = sqrt(3)/2, in which case the answer is pi/3
wrote...
#4
10 years ago
There is "exactly precisely correct" and then there is "pretty close."

If you are looking for a fraction that is pretty close then Rationalize might be interesting.

Rationalize[Sin[Sqrt[3]/2],10^-1] gives 2/3
Rationalize[Sin[Sqrt[3]/2],10^-4] gives 163/214
Rationalize[Sin[Sqrt[3]/2],10^-6] gives 502/659

And make sure you use Sin[] and not Sine[]. Mathematica has no tolerance for misspellings.
wrote...
#5
10 years ago
get a graphing calculater and fill it in you should get your answer Slight Smile
wrote...
#6
10 years ago
yeah you really need one of those graphing calculators...i've never done something like that, nor seen anyone do it by hand.
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  969 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Related Images
  
 1251
  
 51
  
 44
Your Opinion
What's your favorite coffee beverage?
Votes: 299
Previous poll results: Who's your favorite biologist?