Boris Active member
 Subject: Trignometric Identities Sat Mar 07, 2009 3:56 pm  
 hey frndz I am havin problem in these question:
1. cosec^6Acot^6A=3cot^2A cosec^2A+1
2. sec^6Atan^6A=1+3tan^2A+3tan^4A
I have used '^' sign to show 'to the power of '
pls post the ans soon
Last edited by Boris Prashant on Sat Mar 07, 2009 8:49 pm; edited 1 time in total 

Shruti !!! Active member
 Subject: Re: Trignometric Identities Sat Mar 07, 2009 8:20 pm  
 hey phewwww... head breakin sum wit silly ans... the second one is simple..
L.H.S
(sec^{2}A)^{3} tan^{6}A
(1+tan­­^{2}A)^{3 }–tan^{6}A
apply this........ (a^{2}+b^{2})^{3}
1+tan^{6}A+3tan^{2}A+3tan^{4}Atan^{6}A
1+3tan^{2}A+3tan^{4}A
L.H.S =RHS i'll post the first one soon!!!!
Last edited by Shruti Saha on Sat Mar 07, 2009 10:10 pm; edited 1 time in total 

Boris Active member
 Subject: Re: Trignometric Identities Sat Mar 07, 2009 8:42 pm  
 thanxxx
and sorry I posted the Topic Heading wrong It shud be " Trignometric Identities "
I hav corrected it 

QUEST Active member
 Subject: Re: Trignometric Identities Sat Mar 07, 2009 8:55 pm  
 cosec^2 A) ^3  (cot^2A)^3 = (cosec^2A  cot^2 A)^ 3 + 3( cosec^2A.cot^2A)( cosec^2A  cot^2A)
= 1 + 3 ( cosec^2A.cot^2A). ( Use formula ; a^3  b ^3 = ( a  b ) ^3 + 3 ab( a  b ) 

siya Active member
 Subject: Re: Trignometric Identities Sat Mar 07, 2009 9:04 pm  
 hey qest...in ur soln...i think one thing i rong..i.e, (cosec^2 A) ^3  (cot^2A)^3 = ((cosec^2A  cot^2 A))^3 + 3( cosec^2A.cot^2A)( cosec^2A  cot^2A)=(1)^3+ 3 ( cosec^2A.cot^2A). =1+3 ( cosec^2A.cot^2A). d difference is only in 2nd line...u dit put d power 3 on(cosec^2A  cot^2 A)... 

QUEST Active member
 Subject: Re: Trignometric Identities Sat Mar 07, 2009 9:17 pm  
 ?????? 

siya Active member
 Subject: Re: Trignometric Identities Sun Mar 08, 2009 12:52 pm  
 hey hey hey hey.....sorrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrryyyyy ....i read rong...i think i l have 2 go for n eyesight test 2day...i dint read d power 3 on it....sorrrrrrrrry... 

Apurva Active member
 Subject: Re: Trignometric Identities Sun Mar 08, 2009 1:31 pm  
 siya aaj to eye sight test ke liye mat hi jao kal chale jaana 

siya Active member
 Subject: Re: Trignometric Identities Sun Mar 08, 2009 1:58 pm  
 hehehhe yeah sure!! 

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 Subject: Re: Trignometric Identities  


