29quad sec2A(1+sec2A)=2sec2A

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

(sec2A+1)sec^2A=

(sec 2A+1 ) sec ^(2) A= ................. A) sec A B) 2 sec A C) sec 2A D) 2 sec 2A

Prove that (1+sec2A)(1+sec2^2A)(1+sec2^3A).....(1+sec2^nA)=(tan2^nA)/(tanA)

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

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

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

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

If sec(A+B)+sec(A-B)=2sec A then cos^(2)A equals

a=sec2^(@),b=sec2rArr