Answer:
A technical definition of a function is: a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output.
Step-by-step explanation:
image example:
I'm assuming the question looks like this?

If so then the answer should be:

Hope this helps!
<span>sin A cos B=1/2[sin(A-B)+sin(A+B)]
sin(at)*cos(2at)=1/2[sin(3at)-sin(at)]</span>
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If you can pick more than one i cant read the other ones to tell you what they are but number one is one of them
Try to ask the teacher for help. I am sorry for the person that did not help you.