Step-by-step explanation:

1. b) -2 sec

2.a) root cos

3. b) p^2 - 1 / 2p

4. b) sec theta

5. d) m^2 - n^2 = root 4mn

6. c) m^2 + n^2

7. c) 1

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Answer:

The correct answer of the question is -