Mathematics - Properties of Triangle Question with Solution | TestHub

MathematicsProperties of TriangleGeneral (basic formula based)Medium2 minQB

MathematicsMediumsingle choice

In triangle ABC, $∠ A CB$ = $π$ /6. If sides opposite A,B,C are a= $x^{2}$ +x+1, b= $x^{2}$ -1, c=2x+1, find x.

Answer:

Solution:

Cosine rule at C=30° gives $c^{2}$ = $a^{2}$ + $b^{2}$ − $3$ ab. At that root b=c, B=C=30° and A=120°.

Stream:JEESubject:MathematicsTopic:Properties of TriangleSubtopic:General (basic formula based)

⏱ 2mℹ️ Source: QB

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