The answer that i got is C
Using the identity :
Cos (2a) = 1-2 Sin^2(a)
Therefore :<span>1−2 sin ^2 (22.5∘) = Cos(2a)
= Cos (2 * 22.5) = Cos 45</span>
Answer:
0,4 1,2 2,1 3.5 4.25
Step-by-step explanation:
because i know
Answer:
Step-by-step explanation:
The given radical expressions are: