以下属于基本算法语句的是 。① INPUT语句;②PRINT语句;③IF-THEN语句;④DO语句;⑤END语句;⑥WHILE语句;⑦END IF语句。
sin21°+sin22°+sin23°+…+sin288°+sin289°+sin290°的值为________.
.化简:(1)=________;(2)sin2(-α)-tan(360°-α)tan(-α)-sin(180°-α)cos(360°-α)tan(180°+α)=________;(3)=________.
sin,cos,tan,从小到大的顺序是________.
若|sin(4π-α)|=sin(π+α),则角α的取值范围是________.
若sin=,则sin=________.