find value of 4sin3 75 degree -3cos 15 degree Share with your friends Share 0 Vivek Rai answered this Dear student SIn750=sin(900-150)=cos150, so we have E=4sin3750-3cos150=4cos3150-3cos150=cos3.150(as cos3∅=4cos3∅-3cos∅)so E=cos450=12 Hope this clears your doubt WIth regards 2 View Full Answer
