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Thread: Two trig questions

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    mj8
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    Two trig questions

    Screenshot_2018-01-12-12-20-36-1.png

    Question 9 I have no idea where to start.
    Question 10 i figured out how to get xcos0 but i dont know how to get ysin0.
    These are from cambridge 3u year 11 and theres no answers for these two questions at the back.

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    Re: Two trig questions

    Q9)

    Construct lines:



    Let

    (or any pronumeral of your choice)

    Remember that


    and that can both be written as sums of intervals.

    __________________________________________________ __________

    Q10)

    This question becomes trickier if you don't construct .



    Find , and note that

    You'll get by factorisation.

    __________________________________________________ __________

    I've tried giving you hints, so tell me if you need more.
    Last edited by fan96; 12 Jan 2018 at 2:14 PM.

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    Re: Two trig questions

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