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Posted by **Veronica** on Wednesday, January 6, 2010 at 2:23pm.

2sinx+sin2x = 2sin^3(x)/1-cosx

- math -
**Reiny**, Wednesday, January 6, 2010 at 2:40pmLS = 2sinx + 2sinxcosx

= 2sinx(1 + cosx)

= 2sinx(1 + cosx)**(1-cosx)/(1-cosx)**

= 2sinx(1 - cos^2x)/(1-cosx)

= 2sinx(sin^2x)/(1-cosx)

= 2sin^3x/(1-cosx)

= RS

- math -
**Veronica**, Wednesday, January 6, 2010 at 5:57pmThank you Reiny!

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