Ответы и объяснения

2014-02-24T22:07:55+04:00
5. M = √3sinx+cosx = 2(√3/2sinx + 1/2cosx) = 2sin(x+π/4)
-1≤2sin(x+π/4)≤1
-1/2≤sin(x+π/4)≤1/2
Xmax = -1/2
Xmin = 1/2
6.
...=cos(arccos12/13)cos(arccos4/5) - sin(arccos12/13)sin(arccos(4/5)=12/13*4/5-5/13*3/5=33/75