2. Өрнектің мәнін табыңдар: 1) arcsin0,5 + arccos(-1) - arccos0- arctg1
2)arcsin корень3/2+arccos(-корень2/2)-arccos корень3/2-arcctg1
3)arctg корень3+arccos корень2/2-arccos(-корень3/2)-arcsin1
4)arcsin(-корень3/2)+arccos1/2-arccos0-arcctg(-1)​

        !  Online Чтение

1) arcsin0,5 + arccos(-1) - arccos0- arctg1  =30° +180° -90° -45°  = 75° ;

2) arcsin(√3/2)+arccos(-√2/2)- arccos(√3/2)-arcctg1

= 60°+135° -30°-45° =120° ;

3) arctg(√3)+arccos(√2/2)-arccos(-√3/2)-arcsin1

=60°+45°-150°-90° = - 135° ;

4)arcsin(-√3/2)+arccos(1/2) - arccos(0) - arcctg(-1)​= - 60°+60°-90°-135° = - 225° .        

= = = = = = = = = = = = = = = = = = = = =

* * * - 90° ≤ arcsin(a) ≤90°  ; - 90° < arctg(a) < 90° ; 0° ≤ arccos(a) ≤180° ;  

0° <  arcctg(a) < 180° .  ||  180° = π/2 ||    * * *