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Thread: Need Help with 3D Trig - Please Help!

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    Cadet Heresy's Avatar
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    Need Help with 3D Trig - Please Help!

    Just need help solving Questions 3 and 4, as I didn't learn how to utilise the sine and cosine rules in Year 10... If anyone can help me with these that would be awesome - Thank you for you time!

    PS - This is a worksheet - not an assignment
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    617 pages fan96's Avatar
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    Re: Need Help with 3D Trig - Please Help!

    For Q3 you can consider the (isosceles) triangle with side lengths , and . You can find the desired angle without the use of sine rule or cosine rule.

    Q4 is the same question as Q3 with the slanted height changed.
    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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    Re: Need Help with 3D Trig - Please Help!

    Quote Originally Posted by fan96 View Post
    For Q3 you can consider the (isosceles) triangle with side lengths , and . You can find the desired angle without the use of sine rule or cosine rule.

    Q4 is the same question as Q3 with the slanted height changed.
    Oh wow... Thanks. For some reason I was told to use those haha

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    Re: Need Help with 3D Trig - Please Help!

    Quote Originally Posted by Heresy View Post
    Just need help solving Questions 3 and 4, as I didn't learn how to utilise the sine and cosine rules in Year 10... If anyone can help me with these that would be awesome - Thank you for you time!

    PS - This is a worksheet - not an assignment
    If you still don't know such simple stuff and are doing MX1, suggest you beef up & repair your maths while you still have time. Don't wait till next year.
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    Re: Need Help with 3D Trig - Please Help!

    Quote Originally Posted by Drongoski View Post
    If you still don't know such simple stuff and are doing MX1, suggest you beef up & repair your maths while you still have time. Don't wait till next year.
    Oh trust me I am going to

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    Re: Need Help with 3D Trig - Please Help!

    Quote Originally Posted by Heresy View Post
    Oh trust me I am going to
    I'm very pleased for you. I'm often frustrated when engaged for students who do not have enough time left to fix things.
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