Need help with this question

In picture above

Solution given:

Cos -θ:

since cos -θ=Cos θ

Cos θ :

=:

b=

h=4

p==

So

Sin θ==

So third one is a required answer.

a function could be identified in 3 ways either on a chart,graph, or ordered pairs. first a function is that each point has its own. the rule is that there can be many x's to one y but there can not be 2 x's at different y's. so on a graph when you put a straight line through the y's there should be one dot only to be a function.

step-by-step explanation:

i’ll just s take the points thxs