Question

6. In a AABC, if 32A = 4/B = 64C. calculate 2A Band ZC.
7. In a 44BC. LA = 40°. If the bisectors of Band 2.meet at O. Prove that BOC=110.
8. In
16. Prove that the age​

Answer 1

Answer:

Here given formula is

a2 + b2 + c2 −ab− bc − ca = 0

and it is possible if and only if a = b = c.

From the trial and error method,

1) Let a = b = c = 1

Now substitute these values of a, b, c in the above formula.

We get 1 + 1 + 1 - 1 - 1 - 1 = 3 - 3 = 0

2) Now, let a = b = c = 4

Now substitute these values of a, b, c in the above formula.

We get 16 + 16 + 16 - 16 - 16 - 16 = 48 - 48 = 0.

Hence, it is possible that

a2 + b2 + c2 −ab− bc − ca = 0 iff a = b = c.