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Math Help - homework question

  1. #1
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    homework question

    homework question-trig1.jpg


    homework question-trig-2.jpg


    Hi all from the above , I can`t work out how

    a) the length sin 30degress = 1/2

    b) the length of cos 30 degress = sq root 3/2

    am I missing somthing very simple?

    Dave
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  2. #2
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    Re: homework question

    are you familiar with the side ratios of a 30-60-90 right triangle?
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  3. #3
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    Re: homework question

    thanks, your reply has made sense...thanks
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