Q7 of 113 Page 584

Prove that


To Prove: tan() = tan x + sec x


Proof: Consider L.H.S,


tan() = ()


= =


=


Multiply and divide L.H.S by


=


=


= ()


=


= ()


=


tan( ) = sec x + tan x = R.H.S


L.H.S = R.H.S, Hence proved


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