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Math Help - prove that

  1. #1
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    Talking prove that

    (tan(3pi\11) + 4sin (2pi\11) )^4 =121
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  2. #2
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    Re: prove that

    Solution:

    Given (tan(3pi/11) + 4sin (2pi/11) )^4
    =(4sin(2pi/11)+cot(5pi/22))^4
    =(2.1625+1.1540)^4
    =120.9
    121
    hence proved (tan(3pi/11) + 4sin (2pi/11) )^4=121
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  3. #3
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    Re: prove that

    Hmm Brosnan is right define

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