Answer:
Option D. is correct.
Step-by-step explanation:
[tex]\cot ^{\left(2\right)}\left(73^{\circ \:}\right)-\csc ^{\left(2\right)}\left(73^{\circ \:}\right)\\[/tex]
[tex]\csc \left(73^{\circ \:}\right)=\frac{1}{\sin \left(73^{\circ \:}\right)}[/tex]
[tex]=\cot ^2\left(73^{\circ \:}\right)-\left(\frac{1}{\sin \left(73^{\circ \:}\right)}\right)^2[/tex]
[tex]\left(\frac{1}{\sin \left(73^{\circ \:}\right)}\right)^2 = \left\frac{1}{\sin^2 \left(73^{\circ \:}\right)}\right[/tex]
[tex]=\cot ^2\left(73^{\circ \:}\right)-\frac{1}{\sin ^2\left(73^{\circ \:}\right)}[/tex]
Which is the same as...
[tex]-1[/tex]
