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Solution


Q.

The inverse of cosine function is defined in the intervals:
1 [-π,0]  
2 [-π2,0]  
3 [0,π2]  
4 [π2,π]  

Ans.

(1)

Ans.      [-π,0]

Explanation:

Cosine function with respect to any interval [-π,0], [0,π], [π,2π] etc., is bijective with range [-1,1].