Asked by Stephen
Use a sum-to-product formula to rewrite cos5w+cos2w as a product.
Answers
Answered by
Reiny
the formula you want is
cos a + cos b= 2cos((a+b)/2) * cos((a-b)/2)
so
cos 5w + cos 2W = 2cos(7w/2) * cos(3W/2)
cos a + cos b= 2cos((a+b)/2) * cos((a-b)/2)
so
cos 5w + cos 2W = 2cos(7w/2) * cos(3W/2)
There are no AI answers yet. The ability to request AI answers is coming soon!