For this case we observe that the three angles of the triangle are equal. Also, we have by definition:
A triangle is equilateral, when the three sides have the same length (in addition, the three internal angles measure 60 degrees or.
Answer:
The three sides have the same length
We are given
Firstly, we will simplify left side
and we will check whether it is equal to right side
Left side:
Let's assume y left side expression
now, we can take cos on both sides
we can simplify it
Right side:
Let's assume y left side expression
Multiply both sides by -1
now, we can take cos on both sides
we can simplify it
we can see that
both sides cos(y) value is different
so, this is FALSE.........Answer
