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Thread: Can someone please help 20b,c,d

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    Can someone please help 20b,c,d


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    Re: Can someone please help 20b,c,d

    b) Use the formula for the area of a sector



    c) Use the formula for length of an arc



    Remember that must be in radians for those two formulae.

    d) Use the alternate formula for area of a triangle



    (or alternatively, find the perpendicular height of the triangle with Pythagoras' theorem)

    and you can answer the question using the result of b)

    All of these formulae are on the reference sheet, by the way.
    Last edited by fan96; 22 Jan 2018 at 9:01 PM.
    HSC 2018 - [English Adv.] • [Maths Ext. 1] • [Maths Ext. 2] • [Chemistry] • [Software Design and Development]

    1(3√3) t2 dt cos(3π/9) = log(3√e) | Integral t2 dt, From 1 to the cube root of 3. Times the cosine, of three pi over nine, Equals log of the cube root of e.

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