16-18. Verifying identities Use the given identity to verify the related identity. 16. Use the fundamental identity cosh?x – sinh? x = 1 to verify the identity coth? x -1 = csch? x. 17. Use the identity cosh 2r = cosh? x + sinh?x to verify the identities cosh?x = cosh 2x + 1 2 cosh 2r – 1 - and sinh²x 2 18. Use the identity cosh(x + y) = cosh x cosh y + sinh x sinh y to verify the identity cosh 2x = cosh? x + sinh? x.

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A: If you like the solution then please give it a thumbs up... The Answer is:           Explanation:

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Q: 4. Evaluate ln(i) i n x + iy form. 5. Evaluate sin(3 + 4i ) i n x + iy f orm.

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A: The detailed solution is as follows below:

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Q: Problems Section 12 number 11. Please answer the question

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