(sin(x+2kπ)=sinx)
sin 765° = sin (720°+45°)=sin 45° = (√2)/2
-27√2sin 765° =-27√2.√2/2=-27.2/2=-27.1=-27
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(sin(x+2kπ)=sinx)
sin 765° = sin (720°+45°)=sin 45° = (√2)/2
-27√2sin 765° =-27√2.√2/2=-27.2/2=-27.1=-27