Asked by Daemon
Express the following as a product containing only sines and/or cosines.
sin9x−sin7x
sin9x−sin7x
Answers
Answered by
bobpursley
2*sin[(1/2)*(9*x - 7*x)]*cos[(1/2)*(9*x + 7*x)]
2*sin[x]*cos[8*x]
2*sin[x]*cos[8*x]
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