Answer: A cos (π/4)
I just took a test with this question and got it right
Option C is the correct answer
Step-by-step explanation:
![\huge {x}^{ \frac{4}{7} } = \sqrt[7]{ {x}^{4} } \\](https://tex.z-dn.net/?f=%20%5Chuge%20%7Bx%7D%5E%7B%20%5Cfrac%7B4%7D%7B7%7D%20%7D%20%20%3D%20%20%5Csqrt%5B7%5D%7B%20%7Bx%7D%5E%7B4%7D%20%7D%20%20%5C%5C%20)
Since the wires are going to make an X, if one angle is 72 deg, then you know the angle directly opposite to it is also 72 deg. Looking at a single side of the x, you see there is a total 180 deg angle (72 + unknown angle), so the unknown angle is 180 - 72, and the angle directly opposite to it will be the same.
Answer:
(x+9)(x+10)
Step-by-step explanation:
9*10=90
9+10=19