Posted by CJ on Wednesday, January 12, 2011 at 7:10pm.
Assuming there is no typo,
sin x - tan x - sin x=0
=>
sin(x) - sin(x) - tan x=0
=>
-tax(x) = 0
=>
tan(x) = 0
for 0≤x≤360°
tan(x) = 0 when x=0, 180 and 360°
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