Grade 11Trigonometry
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
1 Answer
Yash Baheti
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.
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.
Other Related Questions on trigonometry
In ABC, if cot A+cot B+cot C = cosecA cosecB cosecC, then prove that ABC is right angle triangle.
In ABC, if cot A+cot B+cot C = cosecA cosecB cosecC, then prove that ABC is right angle triangle.
trigonometry
Last Activity: 3 Years ago
- Find the general solution of equation tan3∂=cot2∂
For all angles between -720 and +720
- Find the general solution of equation tan3∂=cot2∂
For all angles between -720 and +720
trigonometry
Last Activity: 4 Years ago
Derive a formula for the area of the triangle, given b, A, B, and C. That is, derive the formula: (b^2sinAsinC)/(2sinB)
Derive a formula for the area of the triangle, given b, A, B, and C. That is, derive the formula: (b^2sinAsinC)/(2sinB)
trigonometry
Last Activity: 4 Years ago
WHAT IS THE LIMIT WHEN X TOWARDS TO 0 OF sin6x/5x ? lim𝑥→0 𝑠𝑖𝑛6𝑥/5𝑥
WHAT IS THE LIMIT WHEN X TOWARDS TO 0 OF sin6x/5x ? lim𝑥→0 𝑠𝑖𝑛6𝑥/5𝑥
trigonometry
Last Activity: 4 Years ago