Question

Sort the following values of $\cos x$ in descending order.

• A. $\cos {240}^{\circ }$
• B. $\cos {330}^{\circ }$
• C. $\cos {90}^{\circ }$
• D. $\cos {135}^{\circ }$
• E. $\cos {45}^{\circ }$

Answer 1

Here, we have to arrange the different values of $\cos x$ in descending order.
Let's use the graph of $\cos x$ for the same.


From the graph, we can have the values of $\cos x$ as:
$\cos {330}^{\circ };\cos {45}^{\circ };\cos {90}^{\circ };\cos {240}^{\circ };\cos {135}^{\circ }$