Which of the following are true statements? Select all that apply.
cos 93° = cos 13° cos 80° + sin 13° sin 80°
tan 930 – tan 64°+tan 290
1-tan 64°tan 29°
sin 93° = sin 54° cos 39° + cos 54° sin 39°
o tan 95°+tan 20
tan 93° =)
1-tan 95°tan 2°
sin 93º = sin 105° cos12° - sin 105° cos129.

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

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.

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation:

i need points

step-by-step explanation:

sorry bubs