If sin x=-5/13, then determine sin(x/2). Should I use a compound angle formula for this?

Thanks!

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If sin x=-5/13, then determine sin(x/2). Should I use a compound angle formula for this?

Thanks!

Thanks!

- Seaweed09
**Posts:**6**Joined:**Wed Aug 10, 2011 8:12 pm

Seaweed09 wrote:If sin x=-5/13, then determine sin(x/2). Should I use a compound angle formula for this?

Thanks!

How about using the half-angle identity?

- FWT
**Posts:**98**Joined:**Sat Feb 28, 2009 8:53 pm

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