sin1°+sin2°+sin3°+···+sin88°+sin89°+sin90°的值为多少?最好是写在纸上发过来
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![sin1°+sin2°+sin3°+···+sin88°+sin89°+sin90°的值为多少?最好是写在纸上发过来](/uploads/image/z/3710822-14-2.jpg?t=sin1%C2%B0%2Bsin2%C2%B0%2Bsin3%C2%B0%2B%C2%B7%C2%B7%C2%B7%2Bsin88%C2%B0%2Bsin89%C2%B0%2Bsin90%C2%B0%E7%9A%84%E5%80%BC%E4%B8%BA%E5%A4%9A%E5%B0%91%3F%E6%9C%80%E5%A5%BD%E6%98%AF%E5%86%99%E5%9C%A8%E7%BA%B8%E4%B8%8A%E5%8F%91%E8%BF%87%E6%9D%A5)
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sin1°+sin2°+sin3°+···+sin88°+sin89°+sin90°的值为多少?最好是写在纸上发过来
sin1°+sin2°+sin3°+···+sin88°+sin89°+sin90°的值为多少?最好是写在纸上发过来
sin1°+sin2°+sin3°+···+sin88°+sin89°+sin90°的值为多少?最好是写在纸上发过来
sin1°=cos89°,(sina)^2+(cosa)^2=1,
44+1/2+1=45.5
sin1 sin2 sin3 什么意思?是sin1°?还是sin1?
求sin1°sin2°sin3°…sin89°
sin1°sin2°sin3°...sin89°
sin1°·sin2°·sin3°·……·sin89°【求过程……谢谢】
sin1°+sin2°+sin3°+···+sin88°+sin89°+sin90°的值为多少?最好是写在纸上发过来
计算:sin1°+sin2°+sin3°...+sin89°+sin90°同上
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sin1°+sin2°+sin3°+……sin88°+sin89=
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sin1°sin2°.sin89°=?
(sin1°-cos1°)(sin2°-cos2°)(sin3°-cos3°)……(sin89°-cos89°)=一定要告诉我原因啊 谢谢最后得0.
三角函数题,tan1°*tan2°*tan3°*……*tan89° --------------------------------sin1°+sin2°+sin3°+……+sin89°
比较sin1,sin2,sin3的大小
sin1,sin2,sin3如何比较大小