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读了1958年“公路”第10期第17页所介绍的“用量距法测定偏角”一文之后,感觉其中算式尚有错误,茲提出修正意见供大家参考:因为依倍角函数关系:sin0(?)2sind 而=2sind-COSd同理:COS0(?)2COSd 而=2COS~(2d)-1
After reading the article “Measuring Declination by Spacing Method” introduced in page 10 of “Highway 10” on page 17 in 1958, we feel that there are still some errors in the formula. We hereby propose amendments for your reference: ?) 2sind and = 2sind-COSd Similarly: COS0 (?) 2COSd and = 2COS ~ (2d) -1