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Three angles of a triangle ABC are in Arithmetic progression and two sides are in the ratio b : c = √3 : √2. Find angle A.

Three angles of a triangle ABC are in Arithmetic progression and two sides are in the ratio b : c = √3 : √2. Find angle A.

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1 Answers

Sourabh Singh IIT Patna
askIITians Faculty 2104 Points
7 years ago

Hii

use property of AP and then use the formulae of cosine from solution of triangles to get the answer in the required format.


[a^2 = b^2 + c^2 - 2bc\cos\alpha\,]



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