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  •  » Son asked for help with trig identities.. can't seem to remember how

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Topic review (newest first)

MathsIsFun
2006-01-27 08:26:37

rickyoswaldiow wrote:

My dad teaches maths in a secondary school (in the UK) yet he knows nothing about mathematics!!!

I think it sometimes goes like this:

"Mary, our very talented mathematics teacher, has retired ... who can take over her classes?"
"Ummm ... Sam has the lightest workload"
"Congratulations Sam, you now teach Mathematics"

RickyOswaldIOW
2006-01-27 03:35:39

Where did you learn maths Old_dad?

RickyOswaldIOW
2006-01-27 03:34:12

My dad teaches maths in a secondary school (in the UK) yet he knows nothing about mathematics!!! yikes
A lot of state school teachers in the UK are basically baby sitters.

Old_dad
2006-01-27 00:04:32

Thanks to all.

I keep asking him if he needs any help ... did not actually think he would take me up on it....
It really makes me feel old.

mikau
2006-01-26 19:24:04

Yeah, just had to multiply above and below by cos x and we would have had it.

Wish I could ask my dad for help. He went as far as calculus 2 in college but never really had to use it, so he forgot most of it. What a pity...

MathsIsFun
2006-01-26 18:22:09

Dad was soooo close!

Ricky
2006-01-26 16:15:21







Old_dad
2006-01-26 14:16:01

Can seem to remember how to prove the following identity

    tanx                sinx
-----------  =   ---------------
1 + tanx         sin x + cosx


I can get

sinx
---------
cosx
---------------
cosx + sinx
-------------
   cosx

but cannot get any further.

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