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>
2−1+22+2=32125
Step-by-step explanation:
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Answer:
1) 102/21
2) 21/51
3) 21/24
Step-by-step explanation:
Answer:
Step-by-step explanation:
Your answer is 5.4. :)