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If sinA=5/6, where angle A is in Quadrant 1, find the exact value of sin (1/2A)
 one year ago
 one year ago
If sinA=5/6, where angle A is in Quadrant 1, find the exact value of sin (1/2A)
 one year ago
 one year ago

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NoelGrecoBest ResponseYou've already chosen the best response.0
I assume that's sin (.5A). There is a halfangle formula for sin.
 one year ago

missbdollBest ResponseYou've already chosen the best response.0
so can you please help me solve the problem?
 one year ago

ajprincessBest ResponseYou've already chosen the best response.1
\[\cos^2A+\sin^2A=1\]\[\cos A=\sqrt{1\sin^2A}\] From this \(\cos A\) can be found u can find \(\cos A\). Then use \[\cos A=12\sin^2(\frac{ 1 }{ 2 }A)\]\[\sin \frac{ 1 }{ 2 }A=\sqrt{\frac{ 1\cos A }{ 2 }}\] from this u can find \[\sin \frac{ 1 }{2}A\] Does that help?
 one year ago

missbdollBest ResponseYou've already chosen the best response.0
but do u have an answer?
 one year ago

NotamathgeniusBest ResponseYou've already chosen the best response.0
Mine is at the very top
 one year ago

missbdollBest ResponseYou've already chosen the best response.0
did u use the halfangle formula because i'm getting a radical?
 one year ago

missbdollBest ResponseYou've already chosen the best response.0
dw:1364227944196:dw
 one year ago

ajprincessBest ResponseYou've already chosen the best response.1
dw:1364228079352:dwdw:1364228136955:dw dw:1364228182827:dw
 one year ago

missbdollBest ResponseYou've already chosen the best response.0
is that the complete answer?
 one year ago

missbdollBest ResponseYou've already chosen the best response.0
ok thank you so much
 one year ago

ajprincessBest ResponseYou've already chosen the best response.1
Welcome:) do u get it?
 one year ago
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