Explain how to do this with steps please.
1. Simplify cos(x-y)+cos(x+y)/cosx
I did some of these so far, don't know if it is correct.
Formula: cosxcosy= cos(x+y)+cos(x-y)/2
cos(x-y)+cos(x+y)/cosx
=cosxcosy/2cosx
1. Simplify cos(x-y)+cos(x+y)/cosx
I did some of these so far, don't know if it is correct.
Formula: cosxcosy= cos(x+y)+cos(x-y)/2
cos(x-y)+cos(x+y)/cosx
=cosxcosy/2cosx