Solution:
Given;
[tex]\cos(-1050)[/tex]
Rewrite the expression using;
[tex]\cos(-x)=\cos x[/tex]
Thus;
[tex]\begin{gathered} \cos(-1050)=\cos(1050) \\ \\ \cos(1050)=\cos(330) \end{gathered}[/tex]
Then;
[tex]\cos(330)=\frac{\sqrt{3}}{2}[/tex]
CORRECT OPTION: D
