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

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

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

(sec2A+1)sec^2A=

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

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

Prove the following identities : (sec A)/ (sec A + 1) + (sec A)/ (sec A - 1) = 2 cosec^(2) A

intx((sec2x-1)/(sec2x+1))dx

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

Prove that (sec A-1)/(sec A+1)=((sin A)/(1+cos A))^(2)=(cot A-cos ecA)^(2)

cot^(2)A((sec A-1)/(1+sin A))+sec^(2)A((sin A-1)/(1+sec A))=0