cot44°cot45°cot46° 应该怎么算?

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cot44°cot45°cot46° 应该怎么算?
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cot44°cot45°cot46° 应该怎么算?
cot44°cot45°cot46° 应该怎么算?

cot44°cot45°cot46° 应该怎么算?
cot44°cot45°cot46°
=cot44°*cot45°*tan44°
=(cot44°*tan44°)*cot45°
=1*1
=1