<u>Step-by-step explanation:</u>
To prove:

Identities used:
......(1)
........(2)
.......(3)
Taking the LHS:

Using identity 1:

Using identities 2 and 3:

As, LHS = RHS
Hence proved
Answer:
finding the square root of a negative number is not possible
Answer:
It's not a right triangle, there isn't a right angle anywhere there.
Also, it's not applicable via pythagorean theorem
Step-by-step explanation:
B
explanation: cuz i said so
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