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In Delta ABC if b+c:c+a:a+b=11:12:13, th...

In `Delta ABC if b+c:c+a:a+b=11:12:13`, then `cos A: cos B: cos C`=

A

` 7 : 9 : 4`

B

` 7 : 19 : 25 `

C

` 7 : 2: 24`

D

` 7 : 9 : 23`

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-PROPERTIES OF TRIANGLES-EXERCISE - II
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