sin²(π+α)-sin(α+3π/2)cos(-α)+1的值为
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/29 09:39:27
x)+SS648ߠ}n.P@Fm
F@QmZ6ycMR>lhmXH:QCWC("a*%jaL!ad_\gr: Em
sin²(π+α)-sin(α+3π/2)cos(-α)+1的值为
sin²(π+α)-sin(α+3π/2)cos(-α)+1的值为
sin²(π+α)-sin(α+3π/2)cos(-α)+1的值为
sin²(π+α)-sin(α+3π/2)cos(-α)+1
=(-sina)²-(-cosa)*cosa+1
=sin²a+cos²a+1
=1+1
=2