Results 1 to 2 of 2

Math Help - Evaluate

  1. January 26th 2009, 04:32 AM #1
    dc52789
    dc52789 is offline
    Junior Member
    Joined
    Oct 2008
    Posts
    68

    Evaluate

    Given f(x) = cos x and g(x) = π/2, evaluate f(g(3)).
    Follow Math Help Forum on Facebook and Google+
  2. January 26th 2009, 04:56 AM #2
    Krizalid
    Krizalid is offline
    Math Engineering Student
    Krizalid's Avatar
    Joined
    Mar 2007
    From
    Santiago, Chile
    Posts
    3,654
    Thanks
    12
    You don't even have to compose functions. Note that g(\alpha)=\frac\pi2 for every \alpha\in\mathbb R, so g(3)=\frac\pi2. Hence f\big(g(3)\big)=f\left(\frac\pi2\right)=0.
    Follow Math Help Forum on Facebook and Google+
« Help to plot data in an circle | Trigonometric equations »

Similar Math Help Forum Discussions

  1. evaluate
    Posted in the Algebra Forum
    Replies: 4
    Last Post: April 18th 2010, 12:16 PM
  2. evaluate
    Posted in the Calculus Forum
    Replies: 3
    Last Post: November 21st 2009, 03:26 AM
  3. how do i evaluate...
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: September 4th 2008, 10:55 PM
  4. Please evaluate
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: December 14th 2007, 04:36 PM
  5. Evaluate
    Posted in the Calculus Forum
    Replies: 1
    Last Post: December 3rd 2007, 02:21 AM

Search Tags


/mathhelpforum @mathhelpforum