Answer:
0.25
Step-by-step explanation:
hope that helps!!!!!!!!!!!!!!!!!!!! :)
Answer:
C
Step-by-step explanation:
Sorry if its wrong bro
Recall the double angle identity:

With
measuring between 0º and 90º, we know
. So from the Pythagorean identity, we get

Then

Honestly I don't know that is a really hard question