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Thread: Homework; HELP!

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    Homework; HELP!

    How do you work out "cos(86°)=((hcot(9°))^2 + (hcot(12°))^2 - 600^2) / 2*hcot(9°)*hcot(12°)"? Thank you!

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    Junior Member supR's Avatar
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    Re: Homework; HELP!

    Are you trying to apply the cosine rule for a 3D trig question? I'm lacking context, so I'm not sure how to help.
    HeroWise likes this.
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    Maths Ext 1 - Maths Ext 2 - English Adv - Physics - Chemistry

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