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OpenStudy (anonymous):
sin (x-pi/4)=sqrt2/2(sin x- cos x) show work. Help me please
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OpenStudy (antonio_xx2):
use the difference expansion for sin sin(a - b) = sin(a)cos(b) - cos(a)sin(b) you have A = x and B = pi divide 4
OpenStudy (anonymous):
thank you :)
OpenStudy (antonio_xx2):
sure
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