Answer:
A
Step-by-step explanation:
We know the following:

so the segment EF is equal to

and here we can do a trick :)

you see it's the same

now we plug the values given

so it's option A
Answer:
- B
- A
- B
Step-by-step explanation:
......................
Answer:
Positive one
Step-by-step explanation:
The angle 0 does not lie in any of the four quadrants, it lands directly in between quadrants I and IV. The value of cos 0 is always 1.
There is probability of 7/8 of not getting yellow.
I would say that the answer is B