Q. 284.8( 5 Votes )

Prove that: .

Answer :

formula: – (i)


(ii)


(iii) a2 + b2 + 2ab = (a + b)2


(iv) a2 – b2 = (a – b)(a + b)


(v)



multiplying with, we get








using formula (i) and (ii)



using formula(iii) &(iv)



Dividing with




using formula(v)



[we know that tan 45



therefore L.H.S = R.H.S


Hence, Proved.


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