Triangle ABΓ if α+γ=2β and Γ=120ο show that α/3=β/5=γ/7 please help thanks alex
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Originally Posted by yiapanisa Triangle ABΓ: if α+γ=2β and Γ=120º, show that α/3=β/5=γ/7 By the cosine rule, , since . Thus . But . Deduce that . Combine that with the given equation to conclude that are in the ratio .
thx a lot
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