In a - ABC- R- circumradius and r- inradius- Then the value of acos A-bcos B-ccos C-a-b-c is-

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In a Δ ABC,...

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In a $Δ A B C, R =$ circumradius and $r =$ inradius. Then the value of $\frac{a cos A + b cos B + c cos C}{a + b + c}$ is?

\frac{r}{R}

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\frac{r}{3 R}

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\frac{r}{2 R}

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\frac{2 r}{R}

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Similar questions

In a $Δ$ ABC, R = circumradius and r = inradius. The value of $\frac{a c o s A + b c o s B + c c o s C}{a + b + c}$ is equal to

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In a $Δ$ ABC, let $∠$ C = $π / 2$ .If r is the inradius and R is the circumradius of the triangle, then 2 (r +R) is equal to

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\frac{a c o s A + b c o s B + c c o s C}{a + b + c} = \frac{r}{R}

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∠ C = 90^{o}

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2 (r + R)

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