pls solve this

cot(4/5)-A = cos 2A/(1-sin 2A)

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- Jan 30th 2009, 06:18 AMvungaralastrig identity
pls solve this

cot(4/5)-A = cos 2A/(1-sin 2A) - Jan 30th 2009, 09:50 AMGrandadTrigonometry
- Jan 30th 2009, 02:02 PMSoroban
Hello, vungaralas!

Your equation makes no sense.

Inspired by Grandad's excellent manipulation,

. . I took a guess at the expression on the left side.

Quote:

If that statement is supposed to be an,__identity__

. . I would guess that it should look like this:

. .

We have: .

So the left side is: .

Multiply by

Multiply by

. .

- Jan 30th 2009, 04:12 PMvungaralas
thank u so much