tan(A+B) = (tanA+tanB)/(1-tanAtanB)
=(2/5+3/7)/(1-2/5*3/7)
=(29/35)/(29/35)
=1
猜你喜欢
- 1man:i can't wait to see the loon on jim's face when he looks at his grade
- 2翻译《黔之驴》
- 3Does our english teach live in that building?Could you tell me?
- 4The girl in a yellow dress can be Kate .She likes being in yellow.改错 为什么?
- 5对划线部分提问 英语
- 6200千克的四分之一比1吨的五分之一少多少? 一个数的七倍是二十五分之二十一,这个数的三分之一是多少?
- 7我盼望得到生日礼物.I____ ___ ___ ___ ___my birthday present.
- 8We burn things to make energy .这里的to make是做这补还是做状语啊?
- 9I don’t think Tom is from Shanghai、
- 10The children are playing happily.