सिद्ध कीजिए: `tan 45^(@)-cot 45^(@) =0`

tan(45^(@)+A)tan(45^(@)-A)=1

tan^2 45/(1+tan^2 45)

(tan (45^(@) + alpha ) + tan ( 45^(@) - alpha ))/( cot (45^(@) + alpha ) + cot ( 45^(@) - alpha ))=

Consider the following I. (cot 30^@+1)/(cot30^@ -1) = 2 (cos300^@ +1) II. 2 sin 45^@ cos 45^@ - tan 45^@ cot 45^@ = 0 Which of the above identities is/are correct ?

If A = (sin 45^(@) - sin 30^(@))/(cos 45^(@) + cos 60^(@)) and B = (sec 45^(@) - tan 45^(@))/(cosec 45^(@) + cot 45^(@)) , then which one of the following is correct ?

Evaluate the following (sin 30^(@) +tan 45^(@) -cosec 60^(@) )/( sec 30^(@)+cos 60^(@) + cot 45^(@))

Evaluate the following (sin 30^(@) +tan 45^(@) -cosec 60^(@) )/( cot 45^(@)+cos 60^(@) -sec 30^(@))

Evaluate the following (sin 30^(@) +tan 45^(@) -cosec 60^(@) )/( cot 45^(@)+cos 60^(@) -sec 30^(@))

Evaluate the following (sin 30^(@) +tan 45^(@) -cosec 60^(@) )/( cot 45^(@)+cos 60^(@) -sec 30^(@))