已知半径426米,弧高8米,求弧长多少米?

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/23 06:40:48
已知半径426米,弧高8米,求弧长多少米?已知半径426米,弧高8米,求弧长多少米?已知半径426米,弧高8米,求弧长多少米?cosα=(426-8)÷426=0.981220657276995305

已知半径426米,弧高8米,求弧长多少米?
已知半径426米,弧高8米,求弧长多少米?

已知半径426米,弧高8米,求弧长多少米?
cosα=(426-8)÷426=0.98122065727699530516431924882629
α=11.1214°
2α=22.2418°
弧长:2πR×α÷360=2×3.1415926×426×22.2418÷360=165.370452016≈=165.37米

弧长为2×arccos(418/426)×426=165.3776383米