Posted by CJ on .
Determine sin x  tan x  sin x=0 for 0 ≤ x < 360°

Trigonometry 
MathMate,
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°