Show that for any triangle with sides `a ,b ,a n dc3(a b+b c+c a)<(a+b+c)^2<4(b c+c a+a b)dot` When are the first two expressions equal ?

Show that for any triangle with sides a ,b ,and c, 3(a b+b c+c a)<(a+b+c)^2<4(b c+c a+a b)dot When are the first two expressions equal ?

If Delta is the area of a triangle with side lengths a, b, and c, then show that Delta le (1)/(4) sqrt((a + b + c) abc) . Also show that equality occurs in the above inequality if and only if a = b = c

In any triangle ABC, the side are a=7,b=5 and c=8. Find A.

If Delta is the area of a triangle with side lengths a, b, c, then show that as Delta leq 1/4 sqrt((a + b + c) abc) Also, show that the equality occurs in the above inequality if and only if a = b = c .

If Delta is the area of a triangle with side lengths a, b, c, then show that as Delta leq 1/4 sqrt((a + b + c) abc) Also, show that the equality occurs in the above inequality if and only if a = b = c .

If Delta is the area of a triangle with side lengths a, b, c, then show that as Delta leq 1/4 sqrt((a + b + c) abc) Also, show that the equality occurs in the above inequality if and only if a = b = c .

If Delta is the area of a triangle with side lengths a, b, c, then show that as Delta leq 1/4 sqrt((a + b + c) abc) Also, show that the equality occurs in the above inequality if and only if a = b = c .

If Delta is the area of a triangle with side lengths a,b,c, then show that as Delta<=(1)/(4)sqrt((a+b+c)abc Also,show that the ) equality occurs in the above inequality if and only if a=b=c.

Show that in any triangle ABC, (a+b+c) (tan (A/2) + tan (B/2)) = 2c cot (C/2)

If in a triangle A B C ,acos^2(C/2)+ c cos^2(A/2)=(3b)/2, then the sides a ,b ,a n dc are in A.P. b. are in G.P. c. are in H.P. d. satisfy a+b=cdot