Answer:
Part I: cot(15 degrees) = cot(45 - 30)
Part II: Evaluation is below
Step-by-step explanation:
<em>Everything is done in degrees</em>
<em />
Two angles that differ by 15 degrees that is easy to evaluate is 30 degrees and 45 degrees. The cot(15 degrees) = cot(45 - 30) = 1/tan(45-30) = (1+tan45tan30)/(tan30 - tan45) = (1+ sqrt(3))/(sqrt(3) - 1)
We rationalize this by multiplying 1+ sqrt(3) in the top and bottom, getting:
(4 + 2sqrt(3))/2 = 2 + sqrt(3)
I hope this helps! :)
Answer:
jen
Step-by-step explanation:
Jordan's total number of sit-ups
20+24+28+32= 104
Jen's total number of sit-ups
40+48+56+62=208
divide Jen's sit-ups by Jordan's sit-ups
208/104=2
There might be a variety of averages for the 12 boys.
Answer:
the answer is c, hope this helps
