false
you should know the very basics of trig, but don't spend an extensive amount of time studying obscure trig.
the trig topics that you should focus on are:
- soh-cah-toa
- how to solve right triangles
- the unit circle
- tan θ = sin θ / cos θ
- sin2 θ + cos2 θ = 1
- what sine, cosine, and tangent graphs look like