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" (4) "sec^(2)A=(1+sec2A)=2sec2A...

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

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(sec2A+1)sec^2A=

" (1) sec^(2)A+cosec^(2)A=sec^(2)A*cosec^(2)A

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

Prove that 1+(tan^(2)A)/(1+sec A)=sec A

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

sec^2 A+ sec^2(\pi /2- A) = sec^2A sec^2(\pi/2 -A)

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

Prove that sec^(2)A+"cosec"^(2)A=sec^(2)A"cosec"^(2)A .

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

a=sec2^(@),b=sec2rArr