Results 1 to 2 of 2

Math Help - Need help fast!

  1. #1
    Member
    Joined
    Apr 2008
    Posts
    107

    Need help fast!

    I need to complete these problems and i need to get a perfect or if not ill fail pre-cal and have to take summer school! help please. Thanks a million!

    Express each function as the function of a reference angle.
    (in degrees)

    cot 100
    my answer: cot 80

    sin -290
    my answer:sin 70

    csc 140 ( can someone help me do this one?? I have no clue)

    (in radians)

    sin 8pi/11
    my answer: sin 3pi/11

    II. Find the value of each function.
    (its in degrees)

    cos 30
    my answer: sqrt.3/2

    sec 133 ( can someone help me how to do this one?)

    Thanks!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Moo
    Moo is offline
    A Cute Angle Moo's Avatar
    Joined
    Mar 2008
    From
    P(I'm here)=1/3, P(I'm there)=t+1/3
    Posts
    5,618
    Thanks
    6
    Hello,

    Now that I know what a reference angle is, I can help

    Quote Originally Posted by NeedHelp18 View Post
    I need to complete these problems and i need to get a perfect or if not ill fail pre-cal and have to take summer school! help please. Thanks a million!

    Express each function as the function of a reference angle.
    (in degrees)

    cot 100
    my answer: cot 80
    sin(80)=sin(100)
    cos(80)=-sin(100)

    Hence it is not cot 80

    sin -290
    my answer:sin 70
    Ok.

    csc 140 ( can someone help me do this one?? I have no clue)
    140 is in the second quadrant. Hence, its reference angle will be 180-140=40.
    sin(40)=sin(140)
    Hence, csc(40)=csc(140)



    sin 8pi/11
    my answer: sin 3pi/11
    Ok.

    II. Find the value of each function.
    (its in degrees)

    cos 30
    my answer: sqrt.3/2
    Ok.

    sec 133 ( can someone help me how to do this one?)
    sec(133)=1/cos(133) ~ -1.466
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. need help fast
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: June 25th 2008, 12:53 PM
  2. i need help fast....x
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: June 2nd 2008, 05:09 PM
  3. Need help fast
    Posted in the Algebra Forum
    Replies: 1
    Last Post: April 23rd 2008, 12:41 PM
  4. Need help fast
    Posted in the Statistics Forum
    Replies: 1
    Last Post: July 20th 2007, 06:30 PM
  5. Can someone help me fast?
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: April 27th 2005, 11:54 AM

Search Tags


/mathhelpforum @mathhelpforum