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EricPowell
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Homework Statement
Cosx=0. Solve for all angles where 0<x<2∏, and give the general solutions.
Homework Equations
The Attempt at a Solution
Angles:
x=∏/2, 3∏/2.
General solutions (what I think they are):
x=∏/2+n2∏
and
x=3∏/x+n2∏
where n is an integer.
General solutions (what the textbook answer key says they are):
x=∏/2+n∏
where n is an integer
Aren't general solutions supposed to give angles that are all coterminal with any integer value of n? If I use n=0, I get ∏/2. And if I use n=1, then I get 3∏/2. I understand that those are both quadrantal angles that lie on the y axis, but they aren't coterminal with one another...are they?
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