Question 795372
If 4sin(&#952;) = x for 0 < &#952; < &#960;/2,find an expression for sin(2&#952;) in terms of x.
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4sin(&#952;) = x
2sin(&#952;) = x/2
..
sin(&#952;)=x/4
cos(&#952;)=&#8730;(1-sin^2(&#952;))=&#8730;(1-(x^2/16))
..
sin(2&#952;)=2sin(&#952;)cos(&#952;)=x/2*&#8730;(1-(x^2/16))