Find [4cos^2 (pi/20) - 3] [4cos^2(3pi/20) -3]- tan pi/20 Share with your friends Share 1 Lovina Kansal answered this Dear student 4cos2π20-34cos23π20-3-tanπ20=4cos2π2-9π20-34cos2π2-7π20-3-tanπ20=4sin29π20-34sin27π20-3-tanπ20Please recheck your question write in proper mathematical terms. Regards -4 View Full Answer
