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## #1 2009-12-19 21:06:02

Mahamaya
Member
Registered: 2009-11-21
Posts: 6

### Trig is driving me crazy

I dropped out of school sometime ago but am back. To make things worse my math teacher is making things difficult for me. He hardly takes his time to explain math concept and formulas.
The problem am having in trig at the moment is where do i start from to prove things like this:

? Secondly in the following formula
why did we divide through by
and not
or
?

Last edited by Mahamaya (2009-12-19 23:29:42)

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## #2 2009-12-19 22:54:23

MathsIsFun
Registered: 2005-01-21
Posts: 7,685

### Re: Trig is driving me crazy

Maybe just use the math tag for the formulas?

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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## #3 2009-12-20 05:15:30

soroban
Member
Registered: 2007-03-09
Posts: 452

. . .

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## #4 2009-12-24 07:12:11

Sarah Rebekah 13
Guest

### Re: Trig is driving me crazy

Sometime you have crazy Teachers.

## #5 2017-09-19 17:21:06

Monox D. I-Fly
Member
From: Indonesia
Registered: 2015-12-02
Posts: 1,239

### Re: Trig is driving me crazy

Mahamaya wrote:

Secondly in the following formula

why did we divide through by
and not
or
?

Well, you can divide it by

or
. By dividing it with
, you get
. By dividing it with
, you get
. Both are other trigonometry identities. However, we are encouraged to divide it by
to get
which consists of two most basic trigonometry as a result.

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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