Use a scientific calculator to find angle theta rounded to t

Use a scientific calculator to find angle theta rounded to the nearest tenth of a degree csc theta = 2.221 theta = 26.9 degree theta = 26.8 degree theta = 26.7 degree theta = 26.6 degree 0 = 26.5 degree

Solution

Directly we did not get inverse of cosec, sec and cot by using scientific calculator

Sin-1(theta)=cosec-1(1/theta)

Cosec-1(theta)=sin-1(1/theta)

Given

Case(theta)=2.221

Theta=cse-1(2.221)

=sin-1(1/2.221)

=26.7532

26.7