Trig inverse functions
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tan-1 ( -radical 3/3)
-30 degrees, -π/6
tan-1 (-1)
-45 degrees, -π/4
sin-1 (-radical3/2)
-60 degrees, -π/3
cos-1 (1)
0,0
sin-1 (0)
0,0
cos-1 (-radical 2/2)
135 degrees, 3π/4
cos-1 (-radical 3/2)
150 degrees, 5π/6
sin-1 ( 1/2)
30 degrees, π/6
cos-1 (1/2)
60 degrees, π/3
tan-1 (radical 3)
60 degrees, π/3
