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Eamcet Mathematics
Trigonometry Properties of Triangles

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In ΔABC, if(a + b + c)(a - b + c) = 3ac, then

A. ∠B = 60^o

B. ∠B = 30^o

C. ∠C = 60^o

D. ∠A + ∠C = 90^o

E. None of the above

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Correct choice: A

Explanation:

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Eamcet Mathematics Trigonometry Properties of Triangles

Eamcet Mathematics
Trigonometry Properties of Triangles