Mathematics · Properties of Triangles

In a triangle ABC with usual notations, if b + c11 = c + a12 = a + b13, then the ratio cos A : cos B : cos C is:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

17 : 19 : 25✓
219 : 7 : 25
312 : 14 : 20
419 : 25 : 7

Correct answer

7 : 19 : 25

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In a triangle ABC with usual notations, if b + c11 = c + a12 = a + b13, then the ratio cos A : cos B : cos C is:

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In a triangle ABC with usual notations, if b + c11 = c + a12 = a + b13, then the ratio cos A : cos B : cos C is:

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