Question 1120334
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*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \sin^2(2A)\ =\ (\sin(2A))(\sin(2A)\)]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ =\ \(2\sin(A)\cos(A)\)\(2\sin(A)\cos(A)\)]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ =\ 4\sin^2(A)\cos^2(A)]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ =\ 4\(1\ -\ \cos^2(A)\)\(\cos^2(A)\)]


You should be able to finish from here.
								
								
John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
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*[tex \LARGE \ \ \ \ \ \ \ \ \ \  
								
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