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Daemon

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Really Stumped on this one, any help would be great! Thanks!Find the exact value of cos 2x using the double angle formula.
1. 1 answer
2. 471 views
Express the following as a product containing only sines and/or cosines.sin9x−sin7x
1. 1 answer
2. 582 views
sin3x−sinx=0
1. 1 answer
2. 942 views
Express the following as a product containing only sines and/or cosines.sin9x−sin7x
1. 1 answer
2. 1,334 views
Find all solutions in the interval [0,2π)sin3x−sinx=0
1. 1 answer
2. 895 views