cosa-根号三sina

cosa-根号三sina等于多少

cosa-根号三sina等于多少...cosa-根号三sina等于多少

cosa-根号三sina化简

cosa-根号三sina化简...cosa-根号三sina化简

cosa-根号三sina等于什么

cosa-根号三sina等于什么...cosa-根号三sina等于什么

cosa-根号3sina

cosa-根号3sina...cosa-根号3sina

cosc+(cosa-根号三sina)cosb=0求角a

cosc+(cosa-根号三sina)cosb=0求角a...cosc+(cosa-根号三sina)cosb=0求角a

cosa=根号3/3

cosa=根号3/3...cosa=根号3/3

cos-根号3sin

cos-根号3sin...cos-根号3sin

sina+cosa=根号3/3,求cos2a

sina+cosa=根号3/3,求cos2a...sina+cosa=根号3/3,求cos2a

cosa+3sina=根号10

cosa+3sina=根号10...cosa+3sina=根号10

cosx=根号3

cosx=根号3...cosx=根号3