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anonymous
 one year ago
If sinA = 2/3 find cos A/2 =?
need help ASAP
anonymous
 one year ago
If sinA = 2/3 find cos A/2 =? need help ASAP

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misty1212
 one year ago
Best ResponseYou've already chosen the best response.0first find \(\cos(A)\)

misty1212
 one year ago
Best ResponseYou've already chosen the best response.0then use \[\cos(\frac{A}{2})=\sqrt{\frac{1+\cos(A)}{2}}\]

misty1212
 one year ago
Best ResponseYou've already chosen the best response.0dw:1438137818903:dw

misty1212
 one year ago
Best ResponseYou've already chosen the best response.0there is a picture on an angle whose sine is \(\frac{2}{3}\) find the third side via pythagoras

misty1212
 one year ago
Best ResponseYou've already chosen the best response.0once you have the missing side, you know the cosine let me know when you get it

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oh i get it ... i'll give it a try... with some other exercises

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Waiting for lynfran's reply
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