Problem

Tony is checking his homework and discovers that many of his answers do not agree with the...

Tony is checking his homework and discovers that many of his answers do not agree with the solutions manual. Below is his work for Exercise 4.

The correct answer is y = π/2, but Tony says that his answer is also correct because he knows that sin3π//2 = -1

a. How many answers to Exercise 4 are possible?
b. Is Tony correct when he says that sin 3π/2 = - 1? If so, what is wrong with Tom's answer?

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Solutions For Problems in Chapter 2.5

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