a) Explain what a trigonometric identity is. b) give an example of a trigonometric identity, and c) explain how you could verify one. d) What is a common mistake other students may make while attempting to prove trigonometric identities?

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Q: The Z-transform of the following function f[k] = 2 + .(-5)* - 33(-4)* is 42 so the constants A and B…

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