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TRIGNOMETRY

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ZOGA27JUNE
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PostSubject: TRIGNOMETRY Sun Jan 13, 2008 2:40 pm

hey guys Smile
! i was preparing 4 my maths exam (its 2mrw) n i came acros ths q.its
realy an interesting q n i lykd it,so i thot i'l put ths q up 4 u
guys.its a very typical q.

In triangle ABC,prove that:

tan (B+C/2)=cotA/2



LETS C WHO SOLVES IT 1ST.............. Wink study !!!!!!!!!!!!!!!!

i'l post d solution 2mrw......so....y ya staring at it..???win....bt m realy sory i cnt gv u ne prize 'cept these
' Like a Star @ heaven Like a Star @ heaven Like a Star @ heaven Like a Star @ heaven Like a Star @ heaven Like a Star @ heaven ',bt course u'l get d satisfaction of solvng it 1st n plz corectly !!!!!!

Cool ZOGA27JUNE
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ZOGA27JUNE
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PostSubject: Re: TRIGNOMETRY Mon Jan 14, 2008 9:21 pm

hey this z 4 ppl who r interested Rolling Eyes .

SOLUTION TO THE PROBLEM POSTED ABOVE.

in a triangle the sum of all angles is 180,hence it can be written :

LA + LB + LC = 180 (L - angle)

A+B+C/2 = 180/2 (ITS WHOLE ON 2)

A+B+C/2 = 90

A/2 + B/2 + C/2 = 90

B+C/2 = 90 - A/2


tan ( B+C/2) = cot A/2

LHS : tan (B+C/2) = tan (90- A/2)

= cot A/2 since tan (90 - A) = cot A


Smile x - x - x - x - x Smile
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amydecia
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PostSubject: Re: TRIGNOMETRY Fri May 20, 2011 1:04 pm

Trigonometry is really amazing if you got deep in it. If you not understand its basic then in the end to will not meet the answer. these are not that difficult equation. Wink







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vikram04
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PostSubject: Re: TRIGNOMETRY Fri Dec 16, 2011 8:03 pm

trigonometric practice questions at goIIT, prepare solutions of triangles here at http://www.goiit.com/posts/show/0/content-solution-of-triangles-804295.htm
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sanjay.sharma




PostSubject: Re: TRIGNOMETRY Sun Sep 16, 2012 10:27 am

please send me a list of books for preparation of iit jee complete list and their solution also
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amydecia
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PostSubject: Re: TRIGNOMETRY Thu Jan 31, 2013 2:23 pm

ZOGA27JUNE wrote:
hey this z 4 ppl who r interested Rolling Eyes .

SOLUTION TO THE PROBLEM POSTED ABOVE.

in a triangle the sum of all angles is 180,hence it can be written :

LA + LB + LC = 180 (L - angle)

A+B+C/2 = 180/2 (ITS WHOLE ON 2)

A+B+C/2 = 90

A/2 + B/2 + C/2 = 90

B+C/2 = 90 - A/2


tan ( B+C/2) = cot A/2

LHS : tan (B+C/2) = tan (90- A/2)

= cot A/2 since tan (90 - A) = cot A


Smile x - x - x - x - x Smile

It's amazing...Mathematics is one of mine favorite subject in school life & college life..I always got good marks in mathematics & Trigonometry is too interesting topic in mathematics if we are learning to depth.....
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