14
using the defects method, which of these relationships represents the law of cosines if the measur
and b of aabc is more than 90°?
a
area of square 2 = -area of square am - area of squareb? + area of defectq + area of defe
fill
area of square 2 = area of square a2 + area of squareb? + area of defectq - area of defe
aree
r
c
c
area of square 2 = area of square a2 + area of squareb? - area of defect; - area of defe
od.
area of square
= area of square at + area of squarebe + area of defect + area of defec
e. area of square 2 = area of square - area of squareb? + area of defect1 - area of defec
reset
next

4

step-by-step explanation:

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.