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agillogly

  • 3 years ago

Suppose a triangle has sides a, b, and c let theta be the angle opposite the side of length a. If cos theta < 0 what must be true? a- b^2+c^2>a^2 b- a^2+b^2=c^2 c- b^2+c^2<a^2 d- a^2+b^2>c^2

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  1. dpaInc
    • 3 years ago
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    cos(theta) being negative means theta is greater than 90 degrees... the triangle is obtuse... so i think it's c

  2. agillogly
    • 3 years ago
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    It was, thanks(:

  3. dpaInc
    • 3 years ago
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    yw...:)

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