PLS HELP...

Question

PLS HELP SOS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Answer 1

1) х + π  = 0  , ⇒ х = -π      (А)
2) Cosx = √3,  ∅                  (В)
3) √x = 4, ⇒ x = 16              (Б)
4) (х -1)/(х +7) = 0, х = 1     (Д)