= - 4cos x
2) [ -4; 0 ]
3) [-4; 4]
4)
(-∞; ∞)б) y = 3sin х/2
1) [-1,5;1,5]
2) [ -3; 3]
3) (-3; 3)
4) [-1; 1]
в) у =sin x - 2
1) [-3; -1]
2) (-∞; ∞)
3) [ -1; 1 ]
4) [ -3; 0]
г) y = sin2 x + 3
2) [3;4]
3) [0;4]
1) [0;1]
4) [ 0; 3]