Given:

It's required to find cos 2θ.
We use the formula:

Substituting:

Operating:

Answer: 1/25
Answer:
1.28
Step-by-step explanation:
First, you need to do 82/64, which will give you just x. Then, you need to round to three places. Without rounding it would be 1.28125
So with rounding it would be 1.28. Hope this helps and Happy learning!
Is there an image so I can see
Answer:
hhhhhh
Step-by-step explanation:
i think it is 40