3 arcsin(-1) -3/2 arccos(√3/2)-7,5 arctg(-1/√3) ❤

Question

3 arcsin(-1) -3/2 arccos(√3/2)-7,5 arctg(-1/√3)
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Answer 1

3 arcsin(-1) -3/2 arccos(√3/2)-7,5 arctg(-1/√3) =
= -3 -1,5*π/6 +7,5*π/6  = -3 +6π/6