prove

Asked by Sonal13 | 12th Jun, 2009, 04:27: PM

Expert Answer:

sec^4A(1+sin^4A)-2tan^2A = 1

(1+tan2A)2+tan4A-2 tan2A=1

1+tan4A+2tan2A+tan4A-2 tan2A=1

2 tan4A=0

tanA=0

A=nΠ

Answered by  | 13th Jun, 2009, 06:58: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.