Question

Help with trig...?

Answer 1

@Vocaloid @SkyVoltage43

Answer 2

you kind of just have to know these from memory

sin^2(x) + cos^2(x) = 1 and tan(x) = sin(x)/cos(x) are the only two identities from that list that are true, the rest are false

Answer 3

Thank you @Vocaloid