i need help with four of these problems Use a calculator to

i need help with four of these problems

Use a calculator to find the value of the function in degrees. Round to the nearest hundredth when necessary. sin T 0.8033) O A. 53.46 O B. 143.47 O C. 38.77 O D. 53.45

Solution

1) sin^-1(-0.8033) = -53.45 degree ===========> (option D)

2) sin^-1(sin(pi/5)) = sin^-1(0.58778525) = pi/5 ===========> (option D)

3) tan(cos^-1(sqrt(3)/2)) = tan(30) = sqrt(3)/3 ===========> (option A)

4) sin^-1(cos(2pi/3)) = sin^-1(-0.5) = -pi/6===========> (option C)