A:y=2sin(2x+ π4 )
B:y=2sin(2x+ π3 )
C:y=2sin(2x﹣ π4 )
D:y=2sin(2x﹣ π3 )
如图,⊙半径是1,A、B、C是圆周上的三点,∠BAC=36°,求劣弧BC的长
若代数式 x+1(x−3)2 有意义,则实数x的取值范围是( )
He is __________ than any other student in his class.
关于温度、内能和热量,下列说法正确的是( )