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OpenStudy (anonymous):
cos 2x(2cosx+1)=0
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OpenStudy (anonymous):
want me to prove it?
OpenStudy (anonymous):
..enter answer in comma-seperated list.. I guess?
OpenStudy (anonymous):
i will just do the proving you do the rest okay?
OpenStudy (cwrw238):
or is this an equation to be solved?
OpenStudy (anonymous):
cwrw238 - that is the same question im asking .. lol
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OpenStudy (anonymous):
okay.Yea solve the equation
OpenStudy (anonymous):
help please..
OpenStudy (cwrw238):
sure
OpenStudy (anonymous):
@cwrw238 i am not getting it ....
OpenStudy (cwrw238):
cos2x = 0 2cosx + 1 = 0
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OpenStudy (cwrw238):
the question didnt state the range of x so assume 0 =< x =< 360
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