1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Trig Funtions Problems

  1. Feb 8, 2005 #1
    Im having some problems with some trig function question...im not really understanding what they are asking with these type of questions?

    help please

    determine the larger angle a in the range pie<a<2pie

    sec A = 1.2048

    answer a= (in radians)

    the answer is 5.6915 rads
  2. jcsd
  3. Feb 8, 2005 #2
    ok so the question is that we want to determine the larger angle [tex] \alpha [/tex] in the range [tex] \pi < \alpha < 2\pi [/tex]

    Now [tex] \sec x = \frac{1}{\cos x} [/tex] See if you can go from here.
  4. Feb 8, 2005 #3
    First, start off by writing secant as a cosine function:

    [tex]\frac{1}{\cos A}=1.2048[/tex]

    Now, solve the function for A. Remember, [itex]\arccos A[/itex] is only defined from 0 to [itex]\pi[/itex] so you have to find a corresponding angle between [itex]\pi[/itex] and [itex]2\pi[/itex]

    good luck.
  5. Feb 8, 2005 #4
    yea but how do i put it in radians?
  6. Feb 8, 2005 #5

    Doc Al

    User Avatar

    Staff: Mentor

    This question would make more sense if asked about the range from 0 to [itex]2\pi[/itex], since there would be two angles with sec = 1.2048. But there's only one in the range of [itex]\pi[/itex] to [itex]2\pi[/itex], so the question doesn't make that much sense.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Trig Funtions Problems
  1. Trig Problem (Replies: 1)

  2. Trig Problem (Replies: 6)