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Mark the tick against the correct answer in the following:
The value of is
To Find: The value of
Now, let x =
cos x =cos (
)
Here ,range of principle value of cos is [0,]
x =
[0,
]
Hence for all values of x in range [0,] ,the value of
is
cos x =cos (2
) (
cos (
)= cos (
) )
cos x =cos (
) (
cos (
)= cos
)
x =