√3 cos40°+sin40°/sin40°cos40°

网友回答

(√3 cos40°+sin40°)/(sin40°cos40°)
=4(√3/2* cos40°+1/2 *sin40°)/(2sin40°cos40°)
=4(sin60° * cos40°+cos60° *sin40°)/(2sin40°cos40°)
=4sin(60°+40°)/sin80°
=4sin100°/sin80°
=4sin80°/sin80°
=4======以下答案可供参考======
供参考答案1:
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