Science:Math Exam Resources/Courses/MATH152/April 2010/Question A 24
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Question A 24 

For questions A22  A24 below, , are complex numbers given below: A24: Evaluate . Put your answer in the form where and are real numbers. 
Make sure you understand the problem fully: What is the question asking you to do? Are there specific conditions or constraints that you should take note of? How will you know if your answer is correct from your work only? Can you rephrase the question in your own words in a way that makes sense to you? 
If you are stuck, check the hint below. Consider it for a while. Does it give you a new idea on how to approach the problem? If so, try it! 
Hint 

The trick is to multiply enumerator and denominator by the complex conjugate of the denominator. That way you just divide by a real number, which is easy to handle. 
Checking a solution serves two purposes: helping you if, after having used the hint, you still are stuck on the problem; or if you have solved the problem and would like to check your work.

Solution 

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Please rate my easiness! It's quick and helps everyone guide their studies. Using the hint and the facts and i^{2} = 1 we compute 