Answer:
3/2
Step-by-step explanation:
slope=rise/run=30/20=3/2
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:

Step-by-step explanation:
Given

Required
Evaluate when n = 12
Substitute 12 for n in 

Simplify the fraction


Answer:
8.8, you have to do long devision
Step-by-step explanation:
Hope this helps!