sin(6°)cos(12°)cos(24°)cos(48°

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cos6°sin6°cos12°cos24°cos48°/cos6°

                           =sin12°cos12°cos24°cos48°/2cos6°

                           =sin24°cos24°cos48°/4cos6°

                           =sin48°cos48°/8cos6°

                           =sin96°/16cos6°

                           =cos6°/16cos6°

                           =1/16 前面乘以个cos6°

sin(6°)cos(12°)cos(24°)cos(48°-第1张图片-

标签: cos sin

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