The digits of a two-digit number sum to 8. When the digits are reversed, the resulting number is 18 less than the original numbe
2 answers:
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Given:
A triangle ABC.
The given expression for b is:
To find:
The expression that is equivalent to b.
Solution:
According to the Law of Cosines,
It can be written as:
...(i)
We have,
...(ii)
On comparing (i) and (ii), we get
Therefore, the required values are .