For the equation cos^(-1)x+cos^(-1)2x+pi...

For the equation `cos^(-1)x+cos^(-1)2x+pi=0` , the number of real solution is

A

(a) 1

B

(b) 2

C

(c) 0

D

(d) `oo`

Verified by Experts

The correct Answer is:

C

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