to prove

Asked by fathima12 | 18th Aug, 2010, 11:33: PM

Expert Answer:

Dear Student,
 
LHS = sec4A [1-sin4A] - 2tan2A
 
= sec4A - tan4A - 2tan2A
 
= (1 + tan2A)2 - tan4A - 2tan2A
 
= 1 + tan4A + 2tan2A - tan4A - 2tan2A
 
= 1
 
= RHS
 
Hence Proved.
 
Regards Topperlearning.

Answered by  | 19th Aug, 2010, 12:49: AM

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