当x≠0时,求cos(x/2)cos(x/4)······cos(x/2?)的极限

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当x≠0时,求cos(x/2)cos(x/4)······cos(x/2?)的极限当x≠0时,求cos(x/2)cos(x/4)······cos(x/2?)的极限当x≠0时,求cos(x/2)cos

当x≠0时,求cos(x/2)cos(x/4)······cos(x/2?)的极限
当x≠0时,求cos(x/2)cos(x/4)······cos(x/2?)的极限

当x≠0时,求cos(x/2)cos(x/4)······cos(x/2?)的极限
试着乘以X/2的正弦,用 2*X/2正弦*X/2余弦=X正弦~循环应用此公式~完毕