计算下列的值(一)sin5π/2+cos²17π/3-tan²23π/6
问题描述:
计算下列的值(一)sin5π/2+cos²17π/3-tan²23π/6
sin5π/2+cos²17π/3-tan²23π/6
答
sin5π/2+cos²17π/3-tan²23π/6
=sinπ/2+cos²π/3-tan²(-π/6)
=1+1/4-1/3
=11/12