1) cos²¹ (-²) == 2) arctan (-1) = (Cos-c2tant can -12-09-0 27 4) arcsec (2) (-4) arctanc-10-27 5) sin (tan¹ (√3)) 3) sin'¹ () Sin-1 (√2) F رگر ng. 6) cos ¹(sin (-))

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