Answer:
The 3 numbers must be multiples of 3, 4, and 5
Step-by-step explanation:
Pythagorean Triples are numbers that you know will come out perfectly in the Pythagorean Theorem. But the easiest way to explain this is to show you an example.
Say you're given the numbers 12, 16, and 20.
They should be able to be divided by the same number and equal 3, 4, and 5.
In this case, the number is 4.
12/4=3
16/4=4
20/4=5
So, this is a 3-4-5 triangle, or a Pythagorean Triple.
Given:
cos 120°
To find:
The exact value of cos 120° in simplest form with a rational denominator.
Solution:
We have,
It can be written as
![[\because \cos (90^\circ-\theta)=-\sin \theta]](https://tex.z-dn.net/?f=%5B%5Cbecause%20%5Ccos%20%2890%5E%5Ccirc-%5Ctheta%29%3D-%5Csin%20%5Ctheta%5D)
![[\because \sin 30^\circ=\dfrac{1}{2}]](https://tex.z-dn.net/?f=%5B%5Cbecause%20%5Csin%2030%5E%5Ccirc%3D%5Cdfrac%7B1%7D%7B2%7D%5D)
Therefore, the exact value of cos 120° is 
.
Answer:
False
Step-by-step explanation:
Answer: 96
Step-by-step explanation:
