JEE Previous Year Question

The value of ${\text{cos}}^{-1}\text{⁡}\left(\text{cot}\text{⁡}\left(\frac{\pi }{2}\right)\right)+{\text{cos}}^{-1}\text{⁡}\left(\text{sin}\text{⁡}\left(\frac{2\pi }{3}\right)\right)$ is

Topic: JEE PYQ

Answer: A. Full step-by-step solution below.