90-2*[arc tan 1/(1+根号2)] 等于几
问题描述:
90-2*[arc tan 1/(1+根号2)] 等于几
答
arc tan ((根号2)-1)=15度.所以90-2*[arc tan 1/(1+根号2)]=90-2*[arc tan ((根号2)-1)]=60
90-2*[arc tan 1/(1+根号2)] 等于几
arc tan ((根号2)-1)=15度.所以90-2*[arc tan 1/(1+根号2)]=90-2*[arc tan ((根号2)-1)]=60