sin^2 44度+sin^2 46度+cot53度*cot37度等于多少

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sin^2 44度+sin^2 46度+cot53度*cot37度等于多少
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sin^2 44度+sin^2 46度+cot53度*cot37度等于多少
sin^2 44度+sin^2 46度+cot53度*cot37度等于多少

sin^2 44度+sin^2 46度+cot53度*cot37度等于多少
sin^2 44度+sin^2 46度+cot53度*cot37度
=sin²44°+cos²44°+cot53°tan53°
=1+1
=2

2

不好意思,我知道后面那一块 等于1

sin²44°+cos²44°+cot53°tan53°
=(sin²44°+cos²44°) + (cos53°/sin53°)(sin53°/cos53°)
= 1 + 1
= 2