sin(pi/12)=(1/2)(sqrt(A-sqrt(B))). I get the part about the half-angle identity sin(x/2)= +-Sqrt((1-cosx)/(2))). But I dont even know where to start with this problem. I'm supposed to figure out what A and B are.

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- Oct 7th 2013, 06:10 PMrhcprule3Can someone walk me through this trig problem?
sin(pi/12)=(1/2)(sqrt(A-sqrt(B))). I get the part about the half-angle identity sin(x/2)= +-Sqrt((1-cosx)/(2))). But I dont even know where to start with this problem. I'm supposed to figure out what A and B are.

- Oct 7th 2013, 06:31 PMSlipEternalRe: Can someone walk me through this trig problem?
Let's write it out. . So, let's equate things that look similar. means that or . So plug that in.

Multiply both sides by 2:

Square both sides:

Give me a possible value for . Once you choose a value for , subtract it from both sides, then solve for . - Oct 7th 2013, 07:15 PMrhcprule3Re: Can someone walk me through this trig problem?
so I can just choose anything for A?

- Oct 7th 2013, 07:21 PMProve ItRe: Can someone walk me through this trig problem?
- Oct 7th 2013, 07:45 PMSlipEternalRe: Can someone walk me through this trig problem?
- Oct 7th 2013, 08:15 PMibduttRe: Can someone walk me through this trig problem?
- Oct 8th 2013, 04:59 AMrhcprule3Re: Can someone walk me through this trig problem?
Thanks guys, I got her!!