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Higher Maths :|

Former MemberFormer Member Posts: 1,876,324 The Mix Honorary Guru
Needing fast help, it just dawned on me that I have an assignment for tommorow - oops :lol:

So yeah, my question is that I have a question 4(sin^2)x = 1 where x lies between 0 deg. and 180 deg, find the exact solutions for x?

I managed to get that to 2cos2x = 1/2 but where do you go from there :confused: ? I did have course notes but lost them a while ago :lol:

Please help :)

Comments

  • Former MemberFormer Member Posts: 1,876,324 The Mix Honorary Guru
    well I am at no means a good mathematician, but how about you divide the equation through four

    sin^2(x) = 1/4

    take the squareroot

    sin(x) = +/- 1/2

    and now just find out which angle x represents so you get +/- 1/2 if you take the sine of it.

    (I understood that, as 'x' being the argument of the sine)..
  • Former MemberFormer Member Posts: 1,876,324 The Mix Honorary Guru
    Oh yeah that could be it :yes:, that sounds kinda right :D!!
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