Math Is Fun Forum

debjit625

Member

Registered: 2012-07-23

Posts: 101

Trigonometric Prove

If

,prove that

I can't solve this part

Thanks

Last edited by debjit625 (2013-05-12 03:59:45)

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Debjit Roy
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The essence of mathematics lies in its freedom - Georg Cantor

Bob

Administrator

Registered: 2010-06-20

Posts: 10,184

Re: Trigonometric Prove

hi debjit625

You can construct a recurrence relationship like this:

Using this repeatedly on the LHS, you can write T10 in terms of T8, which you can write in terms of T6 and so on.  Note that

So eventually you'll end up with a quadratic in Z, where all the terms cancel leaving zero as required for the RHS.

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

debjit625

Member

Registered: 2012-07-23

Posts: 101

Re: Trigonometric Prove

Sorry for the late reply...

Thanks Bob I will try it.

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Debjit Roy
___________________________________________________
The essence of mathematics lies in its freedom - Georg Cantor

debjit625

Member

Registered: 2012-07-23

Posts: 101

Re: Trigonometric Prove

I was bit busy with my studies so I didn't reply...
Yes ,bob it worked

Thanks again

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Debjit Roy
___________________________________________________
The essence of mathematics lies in its freedom - Georg Cantor

Bob

Administrator

Registered: 2010-06-20

Posts: 10,184

Re: Trigonometric Prove

Excellent! 

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob