7f9e8b7a-3dd3-4260-8481-c4500b1c75be
P pickle313 Joined Feb 3, 2018 Messages 4 Oct 7, 2018 #2 I just wanted to point out that the correct double angle formula for cosine would be Code: cos(2a)=cos[sup]2[/sup](a)-sin[sup]2[/sup](a)=2cos[sup]2[/sup](a)-1=1-2sin[sup]2[/sup](a)
I just wanted to point out that the correct double angle formula for cosine would be Code: cos(2a)=cos[sup]2[/sup](a)-sin[sup]2[/sup](a)=2cos[sup]2[/sup](a)-1=1-2sin[sup]2[/sup](a)
