Posted by Jasmine on .
solve the equation in the interval [0,2pi) tan (t/2)sint=0

Help me trig. 
Steve,
tan(t/2)  sint = 0
(1cost)/sint = sint
1cost = sin^2 t
1cost = 1cos^2 t
cost(1cost) = 0
cost = 0 or 1
t = pi/2,pi,3pi/2
see
http://www.wolframalpha.com/input/?i=solve+tan%28t%2F2%29+%3D+sint+for+t%3D0..2pi