SOLUTION: cos(0 + pi)= (a) -cos0 (b) -sin0 (c) cos0 (d) sin0 (e) cos20 (All of the 0 have a horizontal line straight through them. I forget what it is called. )

Algebra ->  Trigonometry-basics -> SOLUTION: cos(0 + pi)= (a) -cos0 (b) -sin0 (c) cos0 (d) sin0 (e) cos20 (All of the 0 have a horizontal line straight through them. I forget what it is called. )       Log On


   

Question 755369: cos(0 + pi)=
(a) -cos0
(b) -sin0
(c) cos0
(d) sin0
(e) cos20

(All of the 0 have a horizontal line straight through them. I forget what it is called. )
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
cos(0 + pi)=
(a) -cos0
(b) -sin0
(c) cos0
(d) sin0
(e) cos20
***
cos(x+π)=-cosx (ans.(a))