What is Original Sin?

What is the significance of sin 150,sin 210,sin 30, sin 330,cos 170,cos 10,cos 190,cos 350 how are they relate

• what is the significance of sin 150,sin 210,sin 30, sin 330,cos 170,cos 10,cos 190,cos 350 how are they relate

• Answer:

  Using your unit circle, you can see that: sin 30 = sin 150 = -sin 210 = -sin 330 and cos 10 = cos 350 = -cos 170 = -cos 190 This illustrates some basic identities which you should memorize, namely that sin (180 - x) = sin x and sin (-x)= - sin x and cos (180 - x) = -cos x and cos (-x) = cos x These are probably in the front or back cover of your textbook. :)