Results 1 to 2 of 2

Math Help - write tan10x in terms of tan5x (?!)

  1. #1
    Junior Member
    Joined
    Apr 2008
    Posts
    42

    write tan10x in terms of tan5x (?!)

    We are supposed to:

    "write tan10x in terms of tan5x."

    I'm stumped! I don't remember learning this!

    Please help me!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    o_O
    o_O is offline
    Primero Espada
    o_O's Avatar
    Joined
    Mar 2008
    From
    Canada
    Posts
    1,407
    Do you know the double angle formula for \tan (2\theta ):

    \tan (2\theta) = \frac{2 \tan \theta}{1 - \tan^{2} \theta}

    Here, imagine \theta = 5x
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Write in lowest terms
    Posted in the Algebra Forum
    Replies: 3
    Last Post: March 4th 2011, 12:56 PM
  2. Write the inverse of A in terms of the matrix A
    Posted in the Advanced Algebra Forum
    Replies: 2
    Last Post: April 15th 2010, 07:00 AM
  3. Write the expressions in terms of cosine?
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: March 11th 2009, 12:27 PM
  4. write in terms of sin and cos
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: November 2nd 2008, 01:32 PM
  5. Write Log In Terms of a and b
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: August 4th 2008, 06:20 AM

Search Tags


/mathhelpforum @mathhelpforum