Question 3. You divide 5 1/4 by 3/4 then multiply that by 20.
The answer is 140
If this is supposed to be

Then this can simply be reduced to

by the double angle formula for cosine
F(n)=f(n-1)+3 such that
f(1)=2
Answer:

Step-by-step explanation:
Answer:
b is equal to negative a and a is also equal to negative b
Step-by-step explanation: