求(sin1°)^2+(sin2°)^2+(sin3°)^2+……+(sin89°)^2的值?

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求(sin1°)^2+(sin2°)^2+(sin3°)^2+……+(sin89°)^2的值?求(sin1°)^2+(sin2°)^2+(sin3°)^2+……+(sin89°)^2的值?求(sin1

求(sin1°)^2+(sin2°)^2+(sin3°)^2+……+(sin89°)^2的值?
求(sin1°)^2+(sin2°)^2+(sin3°)^2+……+(sin89°)^2的值?

求(sin1°)^2+(sin2°)^2+(sin3°)^2+……+(sin89°)^2的值?
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