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" 11.Prove that "tan45^(@)-cot45^(@)=0...

" 11.Prove that "tan45^(@)-cot45^(@)=0

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Prove that : cosec^(2)45^(@)-cot^(2)45^(@)=1

Prove that : cosec^(2)45^(@)-cot^(2)45^(@)=1

Prove that (2tan^2 (30^@))/(1-tan^2(30^@))+sec^2(45^@)-cot^2(45^@) = sec(60^@) .

Prove that: i) tan(45^(@)-A/2) = (1-sinA)/(cosA) ii) tan(45^(@)+A/2)= (cosA)/(1-sinA)

Prove that, tan(45^(@) + theta) = (1 + tan theta)/(1- tan theta).

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

Prove that : (2tan^(2)30^(@))/(1-tan^(2)30^(@))+sec^(2)45^(@)-cot^(2)45^(@)=sec60^(@) .

Prove that : tan (45^@-A)= (1-tanA)/(1+tanA) .

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

Find the value of sqrt(3)tan12^(@)cot45^(@)cot60^(@)tan78^(@)