Inverse Sine and Cosine
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arcsin(-√2/2)
-π/4
sin⁻¹(-1/2)
-π/6
sin⁻¹(0)
0
cos⁻¹(cos(2π/3))
2π/3
cos⁻¹(-√2/2)
3π/4
sin(sin⁻¹(-2))
not possible
arccos(-1)
π
cos⁻¹(cos(3π/2))
π/2
cos⁻¹(1/2)
π/3
sin⁻¹(sin(π/6))
π/6
arcsin(-1)
−π/2
sin(cos⁻¹(-.5))
√3/2