Inverse Trigonometric Functions

1. Evaluate to the nearest tenth of a degree the arcsin .866.

  arcsin .866= 66.2^o

  arcsin .866 = 30.0^o

  arcsin .866 = 60.0^o

2. Evaluate to the nearest tenth of a degree the cos ^-1 0.866.

  cos ^-1 0.866.= 1.00^o

  cos ^-1 0.866.= 30.0^o

  cos ^-1 0.866.= 60.0^o

3. Evaluate to the nearest tenth of a degree the arctan (1.2).

  tan (1.42) = 50.2^o

  tan (1.42) = 47.74^o

  tan (1.42) = 0.88

4. Evaluate to the nearest hundredth of a radian the arccos 0.86

  arccos 0.86 = 30.68^o

  arccos 0.86 = 0.54 radians.

  arccos 0.86 = 1.53 radians.

5. Evaluate to the nearest hundredth of a radian the sin ^-1 0.86

 sin ^-1 0.86 = 59.31^o

 sin ^-1 0.86 = 1.32

 sin ^-1 0.86 = 1.04