SOLUTION: What is the angle when cot theta = -1 ? The book has the answer, I just need to know how to do it. Thanks.

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Question 340898: What is the angle when cot theta = -1 ? The book has the answer, I just need to know how to do it. Thanks.
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!




So, in order for ,

Look at the unit circle and find the two places where



But you didn't restrict your solution to any particular set of angles, so your complete answer is:



or



which can be simplified to:



where




John

My calculator said it, I believe it, that settles it