Use a calculator to find the value of the given expressions

Use a calculator to find the value of the given expressions to 4 decimal places: a. tan^-1 (-0.4) b. sec^-1(-3) c. cot^-1(-3/2)

Solution

solution:

a) tan^-1(-0.4)

= -21.8014^o  answer is correct but u did not mention mode its degree

b)

sec^-1(-3)

= 109.47122⁰  in degrees

c) cot^-1(-3/2)

= -33.690068 degrees