Student Support Forum: 'Solving trig equation, solution set contains dups' topicStudent Support Forum > General > Archives > "Solving trig equation, solution set contains dups"
Author 
Comment/Response 
StephenDurr

07/12/13 4:01pm
I enter the following system into Solve:
Solve[{2 Sin[x]^2 + 3 Sin[x] + 1 == 0, 0 < x < 2 \[Pi]}, x]
It gives the following output:
{{x > (7 \[Pi])/6}, {x > (3 \[Pi])/2}, {x > (3 \[Pi])/2}, {x > (
11 \[Pi])/6}}
Why is (3 \[Pi])/2 listed twice (duplicated) in the output?
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