In a triangle ABC the value of acosA+bcosB+cCosC/a+b+c is equal to (A) r/R(b)R/2r(C)R/r(D)2r/R
In a triangle ABC the value of acosA+bcosB+cCosC/a+b+c is equal to
(A) r/R
(b)R/2r
(C)R/r
(D)2r/R
PRAMAY , 10 Years ago
Grade 11
Trigonometry> In a triangle ABC the value of acosA+bcos...
1 Answers
Yash Baheti
Last Activity: 10 Years ago
Hi,
Follow the steps to reach the answer :
Apply the cos formula in terms of S, a, b, c.
Now rearrange the three terms and apply the formula which will connect R & r to S, a, b, c.
You will get the answer.
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