- #1
moe11
- 8
- 0
Homework Statement
cos([tex]\pi[/tex]-x)= -cosX
the formula is cos(A-b) = cosAcosB+sinAsinB
so i sub in the given to get..
cos[tex]\pi[/tex]cosx + sin[tex]\pi[/tex]sinX
then where do i go from there? I am new to math like this, its a much higher level than what I am used to, any help would be very apprieciated. thanks.