Q. 73.6( 8 Votes )

Prove that :
<

Answer :

To prove:


Formula used:



Take L.H.S.:















= R.H.S.


Hence Proved


OR


Given: 2 tan-1 (cos x) = tan-1 (2 cosec x)


To find: value of x


Formula used:



Therefore,


2 tan-1 (cos x) = tan-1 (2 cosec x)




{ sin2 x + cos2 x = 1}









Hence, the value of x is


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