Results 1 to 6 of 6

Math Help - Multiple Angle Formula Help

  1. #1
    Newbie
    Joined
    Apr 2009
    Posts
    12

    Multiple Angle Formula Help

    I have started a new chapter and I am having problems solving #6. I'm not even sure what I should do to start. Any help would be greatly appreciated.

    Follow Math Help Forum on Facebook and Google+

  2. #2
    No one in Particular VonNemo19's Avatar
    Joined
    Apr 2009
    From
    Detroit, MI
    Posts
    1,823
    Quote Originally Posted by whiteforlife View Post
    I have started a new chapter and I am having problems solving #6. I'm not even sure what I should do to start. Any help would be greatly appreciated.

    Start with number ione, and then work your way to the end.

    Recall that \sin\theta=\frac{opposite}{hypotenuse}

    Well, you have the opposite, but not the hypotenuse. To find the hypotenuse, use the pythagorean theorem.

    After you have computed sin, cos, and tan... You can make use of double angle Identities to find the values of the others.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Apr 2009
    Posts
    12
    Quote Originally Posted by VonNemo19 View Post
    Start with number ione, and then work your way to the end.

    Recall that \sin\theta=\frac{opposite}{hypotenuse}

    Well, you have the opposite, but not the hypotenuse. To find the hypotenuse, use the pythagorean theorem.

    After you have computed sin, cos, and tan... You can make use of double angle Identities to find the values of the others.
    I was able to solve 1 & 2 but I do not recall Double Angle Identities. Want to steer me in the right direction?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    No one in Particular VonNemo19's Avatar
    Joined
    Apr 2009
    From
    Detroit, MI
    Posts
    1,823
    Quote Originally Posted by whiteforlife View Post
    I was able to solve 1 & 2 but I do not recall Double Angle Identities. Want to steer me in the right direction?
    Check this out

    Double-Angle and Half-Angle Formulas
    Follow Math Help Forum on Facebook and Google+

  5. #5
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,929
    Thanks
    759
    Quote Originally Posted by whiteforlife View Post
    I was able to solve 1 & 2 but I do not recall Double Angle Identities. Want to steer me in the right direction?
    Double-Angle and Half-Angle Formulas
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Newbie
    Joined
    Apr 2009
    Posts
    12
    Thanks guys that helped alot, I have it all figured out now.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. multiple angle equations
    Posted in the Trigonometry Forum
    Replies: 4
    Last Post: November 23rd 2009, 10:15 PM
  2. Solving a trig multiple angle?
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: October 26th 2009, 08:15 PM
  3. Finding angle/ Double angle formula
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: May 29th 2009, 07:43 AM
  4. Replies: 2
    Last Post: February 15th 2007, 10:16 PM
  5. Vector angle in multiple planes
    Posted in the Geometry Forum
    Replies: 2
    Last Post: January 23rd 2007, 07:59 PM

Search Tags


/mathhelpforum @mathhelpforum