Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Calculating the exact value of an inverse

  1. Feb 20, 2005 #1
    cos[ sin^-1 (1/2) + sin^-1 (-1) ]

    appreciate any help on this
     
  2. jcsd
  3. Feb 21, 2005 #2
    cos(a+b) = ?
     
  4. Feb 21, 2005 #3
    ohh, yes, thanks, how dumb i am....
     
  5. Feb 22, 2005 #4

    dextercioby

    User Avatar
    Science Advisor
    Homework Helper

    [tex]\arcsin \ \frac{1}{2}=\frac{\pi}{6} [/tex]

    [tex]\arcsin \ -1=-\frac{\pi}{2} [/tex]

    Add the 2 results and end up with [tex] -\frac{\pi}{3} [/tex]

    And then
    [tex] \cos \ -\frac{\pi}{3} =\frac{1}{2} [/tex]

    Daniel.
     
    Last edited: Feb 22, 2005
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Calculating the exact value of an inverse
Loading...