(adsbygoogle = window.adsbygoogle || []).push({}); [SOLVED] Finding sin(7.5)

1. The problem statement, all variables and given/known data

Find sin(7.5) using [tex]sin\frac{x}{2} = \sqrt{(\frac{1 - cosx}{2})}[/tex]

2. Relevant equations

sin2x = 2sinxcosx

cos(x-y) = coxcosy + sinxsiny

3. The attempt at a solution

[tex]sin\frac{15}{2} = \sqrt{(\frac{1 - cos15}{2})}[/tex]

= [tex]\sqrt{(\frac{1 - cos(45-30)}{2})}[/tex]

= [tex]\sqrt{(\frac{1 - (\frac{\sqrt(2)+\sqrt(6)}{4})}{2})}[/tex]

After this I don't know what to do. I would like some help please. Thanks.

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# Homework Help: Finding sin(7.5)

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