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Question: finding solutions to trigonometric exercise

Question:finding solutions to trigonometric exercise

PerKirkegaard 30 Maple 17
October 11 2013
1

I am having problems with Maple returning corrct Answer when i use solve

 

solve([-sin(x) = cos(x), 2*Pi > x and x > 0], x, AllSolutions = true)

result is :

           { x = -1/4 - Pi + Pi _Z5 }   

but we have only 3/4 Pi and 7/4 Pi as solution, but _Z5 indicates all integers. How do i get the 2 solutions  and only those 2?

 

Kind regards 

Per Kirkegaard
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