cos(a+b)=-47/51,sina×sina=288/289,求sin(a+b)?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/17 00:20:02
![cos(a+b)=-47/51,sina×sina=288/289,求sin(a+b)?](/uploads/image/z/310953-57-3.jpg?t=cos%28a%2Bb%29%3D-47%2F51%2Csina%C3%97sina%3D288%2F289%2C%E6%B1%82sin%28a%2Bb%29%3F)
cos(a+b)=-47/51,sina×sina=288/289,求sin(a+b)?
cos(a+b)=-47/51,sina×sina=288/289,求sin(a+b)?
cos(a+b)=-47/51,sina×sina=288/289,求sin(a+b)?
sin(a+b) = -sin(cos^(-1)(-47/51)-2 pi*c1),
sin(a+b) = sin(2 pi*c2+cos^(-1)(-47/51))