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September 23, 2014

September 23, 2014

Posted by **Kimberly** on Tuesday, April 24, 2012 at 7:01pm.

2sin2x-3sinx=0

- pre-calc HELP PLEASE -
**Steve**, Wednesday, April 25, 2012 at 10:31amdunno what you mean by "dont use multiple angle method" since

sin2x = 2 sinx cosx

4sinx cosx - 3sinx = 0

sinx(4cosx - 3) = 0

sinx = 0, so x = 0,180,360,...

cosx = 3/4, so x = 41.4,318.6,...

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