help! just converting to fraction!

[KingAce]

the problem is this: tan(cos^-1(12/13))
the decimal answer is .4166repeating

how do I solve this problem in fraction form or convert the decimal to a fraction?

Thanks for your help.

 

[KingAce]

nvm.. i got 5/12

im all set

 

[stapel]

FYI: The customary process is to use the following technique:

0.33333... =   x

3.33333... = 10x

10x    3.3333...
- x   -0.3333...
---   ----------
 9x =  3.0000...

 9x = 3

  x = 3/9 = 1/3

When there are leading non-repeating digits, or when the repeating block is longer than one digit, you may want to multiply by larger values than just 10:

 0.50272727... =   x

50.27272727... =  100x

5027.272727... = 10000x

10000x   5027.2727...
- 100x   - 50.2727...
------   ------------
 9900x = 4977.0000...

 9900x = 4977

     x = 4977/9900= 553/1100

Hope that makes sense! :wink:

Eliz.