So there is an identity we'll need to use to solve this:
cos(x+y) = cosxcosy - sinxsiny
replace the numerator with the right hand side of that identity and we get:
(cosxcosy - sinxsiny)/cosxsiny
Separate the numerator into 2 fractions and we get:
cosxcosycosxsiny- sinxsiny/cosxsiny
the cosx's cancel on the left fraction, the siny's cancel on the right fraction and we're left with:
cosy/siny - sinx/cosx
which simplifies to:
coty - tanx
Solution: Which of the following is not an example of replication?
Answer: Replication is the repetition of an experimental condition so that the variability associated with the phenomenon can be estimated. Therefore option A is not an example of replication
A. Conducting different experiments on the same groups
The given expression 
is equal to 144 or 
<em><u>Solution:</u></em>
Given expression is:
We have to evaluate the above given expression
We know that,
Substituting these in above given expression, we get
Also we know that,
Therefore,
Thus the given expression is equal to 144 or
Answer: y^2-4y-6
Step-by-step explanation:
Multiply 850x.15 which equals 127.5 and then subtract that from 850 and you get 722.5
