Question

can someone explain me this

Answer 1

for function a) find period, domain, range and label the name of the function in graph.
for b) do the same with a but flip the graph reflect to x axis to get the final graph. step by step you calculate and put what you have in graph.

Answer 2

i have problems with finding the domain

Answer 3

domain of sin and cos function is \[(-\infty,\infty)\]because the domain is the range of x , x can "go" from everywhere .

Answer 4

to everywhere . to tan and cot is another topic.