In triangle `A B C ,` if `r_1=2r_2=3r_2,` then `a : b` is equal to `5/4` (b) `4/5` (c) `7/4` (d) `4/7`

In a triangle , if r_(1) = 2r_(2) = 3r_(3) , then a/b + b/c + c/a is equal to

In a triangle,if r_(1)=2r_(2)=3r_(3), then (a)/(b)+(b)/(c)+(c)/(a) is equal to

In a triangle ABC ,if r_(1)=2r_(2)=3r_(3) then [100-((4a)/(5b))]^(2) is equal to 9800+k , then k=

In a triangle A B C , if a : b : c=3:7:8,t h e n R : r is equal to a. 2:7 b. 7:2 c. 3:7 d. 7:3

With usual notations in a triangle A B C , if r_1=2r_2=2r_3 then 4a=3b (b) 3a=2b 4b=3a (d) 2a=3b

In triangle ABC, if cos A+cos B+cos C=(7)/(4),then(R)/(r) is equal to (3)/(4) (b) (4)/(3)(c)(2)/(3)(d)(3)/(2)

In a triangle A B C ,(r_1+r_2)/(1+cosC) is equal to (2a b)/(c"Delta") (b) ((a+b))/(c"Delta") (a b c)/(2"Delta") (d) (a b c)/("Delta"^2)

In triangle ABC, if cos A + cos B + cos C = (7)/(4), " then " (R)/(r) is equal to