Answer: The identity is verified. See the explanation.
Step-by-step explanation:
You must keep on mind the following identities:

Therefore, by substitution, you can rewrite the identity as shown below:

Simpliying, you obtain:

The identity is verified.
Answer:
y=x+5+x+5?
Step-by-step explanation:
I'm not sure and I did this not that long ago
Answer:
First option
Step-by-step explanation:
Have a nice day
Answer:
(there is no screenshots so i cant take a good guess) I would say A
Step-by-step explanation: