Use your results from the previous problem to show that (sin x + cos x)4 − (sin x − cos x)4 = 4 sin(2x). Homework Help ✎
The answer to the previous problem was:
8ab(a2 + b2)
Substitute sinx for 'a' and the cosx for 'b'.
Show all of your work to get the following answer: 4sin(2x)