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已知∠a=50°17′42〃,求∠a的补角和余角的度数.
人气:265 ℃ 时间:2020-03-07 13:20:52
解答
补角=180°-50°17′42〃=179°59'60''-50°17′42〃=129°42'18''
余角=90°-50°17′42〃=89°59'60''-50°17′42〃=39°42'18
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