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August 27, 2015
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Pre Calculus
Posted by
Peter
on
Thursday, April 15, 2010
at 5:11am.
Establish the identity
(cosx/2-sinx/2)^2=1-sin x
Pre Calculus -
Reiny
, Thursday, April 15, 2010 at 8:43am
Hint:
sin 2A = 2sinAcosA
treat x/2 as A
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