若函数y=-2sin(x+φ)(0

若函数y=-2sin(x+φ)(0 函数y=sin(2x+φ)(0 函数y=3sin(2x+φ)(0 设函数y=3sin(2x+φ)（0 已知函数y=2sin(2x+φ)(|φ| 函数y=sin(2x+α),0 函数y=sin(2x+α)(0 如果函数y=3sin(2x+&)(0 设函数 f(x)=sin(2x+y),(-π 3道高数题1,若函数 f(x,y)= sin(x^2 * y) / xy (xy不等于0) ,f(x,y) = 0 (x 三角函数难题!设x∈[0,pi] ,y∈[0,1],试求函数f(x,y)=(2y-1)sin(x)+(1-y)sin(( 若x属于（0,π/4）,求函数y=cos^2x-sin^x+2sinxcosx的值域