If $\alpha, \beta\: and\: \gamma$ are the corresponding angles of the sides a, b and c respectively in an oblique triangle, then according to law of cosins, the value of the square of the side a is

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Sep 18, 2022

If $\alpha, \beta\: and\: \gamma$ are the corresponding angles of the sides a, b and c respectively in an oblique triangle, then according to law of cosins, the value of the square of the side a is

Difficulty: Easy

a^{2}=a^{2}+b^{2}-2ab\cos\alpha

a^{2}=a^{2}+b^{2}-ab\cos\alpha

b^{2}=b^{2}+c^{2}-2ab\cos\alpha

b^{2}=b^{2}+c^{2}-2bc\cos\alpha

ID: 63273db9ca83163ac3a11967