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歡迎您訪問數學考題練習:計算:tan1°tan45°tan89°=__!

數學考題練習:計算:tan1°tan45°tan89°=__

更新時間:2024-01-12 14:03:07作者:貝語網校

計算:tan1°•tan45°•tan89°=________.

試題答案

1

試題解析

根據互余兩角的正切之積為1和特殊角度三角函數值計算.

解答:tan1°•tan45°•tan89°

=tan1°•tan89°•tan45°

=1×1=1.

點評:本題考查特殊角的三角函數值,解題的關鍵在于tan1°•tan89°=1.

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