This problem says:

Showing the steps, not just giving the final answer, find the values of:

a. e^(4 + 2i)

b. Ln(5 - 2i)

c. sin (4(pi) - (pi)i/2)

d. (1 + i)^(2i)

This stuff will be on my final on Tuesday, and I don't really get how to do it at all. If someone would help me with these, that would be great. Please show me how you worked the problem so that I will be able to understand this stuff for the test. Thanks!