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Math Help - trigonometry

  1. #1
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    Exclamation trigonometry

    Hi, i am sruggaling to solve this one out, please help if you can
    tg2^@+ctg2^@, if tg@+ctg@=3
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  2. #2
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    Quote Originally Posted by bibuciks View Post
    Hi, i am sruggaling to solve this one out, please help if you can
    tg2^@+ctg2^@, if tg@+ctg@=3
    try squarring

    (tan @+cot @)^2=(3)^2

    and see what you can get from here .
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  3. #3
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    Question trigonometry

    Thanks, I hope that is it, i don't really have any other options whatsoever
    and i have another one I can not quite understand
    sin2x+cosx=0
    and 2sinx - cos2^x - 2=0
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  4. #4
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    Quote Originally Posted by bibuciks View Post
    Thanks, I hope that is it, i don't really have any other options whatsoever
    and i have another one I can not quite understand
    sin2x+cosx=0
    and 2sinx - cos2^x - 2=0
    \sin(2x) = 2\sin{x}\cos{x} ... substitute, factor, and solve.

    \cos^2{x} = 1 - \sin^2{x} ... again, substitute, factor, and solve.
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