作业帮求最值：（1）y=-2(sin^2)x+2sinx+1 (2)y=[2sinx-1]/[sinx+3]
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 14:34:43
![求最值：（1）y=-2(sin^2)x+2sinx+1 (2)y=[2sinx-1]/[sinx+3]](/uploads/image/z/5349729-57-9.jpg?t=%E6%B1%82%E6%9C%80%E5%80%BC%EF%BC%9A%EF%BC%881%EF%BC%89y%3D-2%28sin%5E2%29x%2B2sinx%2B1+%282%29y%3D%5B2sinx-1%5D%2F%5Bsinx%2B3%5D)
求最值：（1）y=-2(sin^2)x+2sinx+1 (2)y=[2sinx-1]/[sinx+3]
求最值：（1）y=-2(sin^2)x+2sinx+1 (2)y=[2sinx-1]/[sinx+3]
求最值：（1）y=-2(sin^2)x+2sinx+1 (2)y=[2sinx-1]/[sinx+3]
y=-2(sin^2)x+2sinx+1=-2(sin^2x-sinx+1/4)+3/2=-2(sinx-1/2)^2+3/2 -1