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((sin2A)/(secA-1))((sec2A)/(sec2A+1))=...

`((sin2A)/(secA-1))((sec2A)/(sec2A+1))=`

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((sin2A)/(sec A-1))((sec2A)/(sec2A+1))=

((sin 2A)/(sec A -1))((sec 2A)/(sec 2A+1))=

(sec2A+1)sec^2A=

sec^(2)A(1+sec2A)=2sec2A

If 0^(@) le A le 90^(@), find A, if : (sin A)/ (sec A - 1) + (sin A)/ (sec A + 1) = 2

Prove the following identity : (1+ cot A+tan A) (sin A-cos A) =(secA)/(cosec^2 A)- (cosec A)/(sec^2A) .

(1+cotA+tanA)(sinA-cosA)=(secA)/(cosec^2A)-(cosecA)/(sec^2A)

Prove that cot^(2)A ((secA-1)//(1+sinA))+sec^(2)A((sinA-1)/(1+secA))=0

Prove: (cot^2A(secA-1))/(1+sinA)=sec^2A((1-sinA)/(1+secA))

Prove the following identities: (sinA+secA)^2+(cos"A"+"c o s e cA")^2=(1+secAcos e cA)^2 cot^2A((secA-1)/(1+sinA))+sec^2A((sinA-1)/(1+secA))=0