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sin1°+sin2°+sin3°+···+sin88°+sin89°+sin90°

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