Answer:
x = 3π/4, 5π/4
Step-by-step explanation:
cos(x+2π) = -√2/2, [0,2π]
cos(x)cos(2π)-sin(x)sin(2π) = -√2/2
cos(x) = -√2/2
Remember that the cosine function is periodic, so cos(θ+2π)=cos(θ).
this is false
(6+8)^2= 196
6^2+8^2=100
They are not equal so this is a false statement
c. is the answer
The midpoint is (7,4.75) so the y-coordinate should be y=4.75. I hope that helps
