The perimeter of a triangle is the sum of its sides. So, we have
We have an exact value for the perimeter, and variable expressions for the sides. Let's substitute the formula above with what we're given:
If you divide both sides by 12, you have
So, the lengths of the sides are
Answer:
cos(x-30)=1/2
Step-by-step explanation:
We use the following relationship to obtain cos(x)
From that, we have that cos(x)= sqrt(1-1/4)=sqrt(3) / 4
To obtain the value of cos(x-30), lets remember the following expression:
Therefor, we can use that to obtain our desired function cos(x-30)
cos(x)*cos(30)+sin(x)*sin(30)
=2/4=1/2
Like terms have the same variable and power. The sum of the two polynomials is
.
Like terms are those terms that are having the same variables, also the variables are of the same order as well.
for example, 25x and 5x are like terms; 30xy and 7xy are like terms, 9x³ and 4x² are not like terms, etc.
We know that in order to find the sum of the two polynomials we need to add or subtract the like terms, therefore, the sum of the polynomials can be done as,
Hence, the sum of the two polynomials is
.
Learn more about Like Terms:
