cosa-根号三sina等于多少

cosa+根号三sina

cosa+根号三sina...cosa+根号三sina

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

cosa+3sina=根号10

cosa+3sina=根号10...cosa+3sina=根号10

sina+cosa=根号3/3,求cos2a

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

cos-根号3sin

cos-根号3sin...cos-根号3sin

cos根号三等于多少度

cos根号三等于多少度...cos根号三等于多少度

cosc等于根号三

cosc等于根号三...cosc等于根号三

cosa=根号3/2

cosa=根号3/2...cosa=根号3/2

cosc+(cosa-根号3sina)cosb=0

cosc+(cosa-根号3sina)cosb=0...cosc+(cosa-根号3sina)cosb=0