Answer:
it's 264 I believe kdkkdkdjjdruehdhfuffu
Use the trigonometric identity:
![\cos { \left( A+B \right) = } \cos { \left( A \right) } \cos { \left( B \right) } -\sin { \left( A \right) \sin { \left( B \right) } }](https://tex.z-dn.net/?f=%5Ccos%20%7B%20%5Cleft%28%20A%2BB%20%5Cright%29%20%3D%20%7D%20%5Ccos%20%7B%20%5Cleft%28%20A%20%5Cright%29%20%20%7D%20%5Ccos%20%7B%20%5Cleft%28%20B%20%5Cright%29%20%20%7D%20-%5Csin%20%7B%20%5Cleft%28%20A%20%5Cright%29%20%5Csin%20%7B%20%5Cleft%28%20B%20%5Cright%29%20%20%7D%20%20%7D%20)
Now, if A=2u and B=2u:
X² - 81 = 0
x² = 81
x = √81
x = <span>9</span>
D. 160 you simplify the expression to get your answer.
Answer: About (-2.414, 0) and (0.414, 0)
Step-by-step explanation:
Let us graph the equation given and see what the x-intercepts are. These are points where the line intercepts the x-axis. <em>See attached</em>.
This means our x-intercepts are at about (-2.414, 0) and (0.414, 0).
These are also equal to
and ![-1+\sqrt{2}](https://tex.z-dn.net/?f=-1%2B%5Csqrt%7B2%7D)