Find tan0 if sin0= -1 and 0<0<2pie radians

Answer 1

If your question mean:

Find tan θ if sin θ = -1 and 0 < θ < 2 π radians

then

sin θ = - 1

for

θ = 3 π / 2 rad (270°)

cos θ = cos 3 π / 2

cos θ = 0

tan θ = sin θ / cos θ = -1 / 0 = undefined