#### Custom Method

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I don't if anybody is good at trig, can't find any other help so I'm asking here. thanks. Simplify: cosx/(secx-1). Thanks!

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- Thread starter
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never mind, I'm obviously an ignoramus at trigonometry haha

looks like outlaw go it

looks like outlaw go it

= cos(x)[1/cos(x) - 1] + cos(x)/[1/cos(x) + 1]

= cos²(x)/[1 - cos(x)] + cos²(x)/[1 + cos(x)]

= {cos²(x)[1 + cos(x)]}/{[1 + cos(x)][1 - cos(x)]} + cos²(x)[1 - cos(x)]/{[1 + cos(x)][1 - cos(x)]}

= cos²(x) * [1 + cos(x) + 1 - cos(x)]/[1 - cos²(x)]

= cos²(x) * 2/[1 - cos²(x)]

= cos²(x) * 2/sin²(x)

= 2cos²(x)/sin²(x)

= 2[cos(x)/sin(x)]²

Answer = 2cot²(x).

Ow that hurt.

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Not following where you raised sec to the -1... edit: to satch.

Outlaw, you copied that of yahoo answers and that's the wrong problem.

Outlaw, you copied that of yahoo answers and that's the wrong problem.

read it wrong ehNot following where you raised sec to the -1...

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Me or you? haha

probably me, looks like outlaw got the right answer thoughMe or you? haha

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No that's a problem he copied from yahoo answers and is the wrong problem in the beginning.

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= cos(x)[1/cos(x) - 1] + cos(x)/[1/cos(x) + 1]

= cos²(x)/[1 - cos(x)] + cos²(x)/[1 + cos(x)]

= {cos²(x)[1 + cos(x)]}/{[1 + cos(x)][1 - cos(x)]} + cos²(x)[1 - cos(x)]/{[1 + cos(x)][1 - cos(x)]}

= cos²(x) * [1 + cos(x) + 1 - cos(x)]/[1 - cos²(x)]

= cos²(x) * 2/[1 - cos²(x)]

= cos²(x) * 2/sin²(x)

= 2cos²(x)/sin²(x)

= 2[cos(x)/sin(x)]²

Answer = 2cot²(x).

That's Egyptian hieroglyphs.....right ?

If not...you are speaking a language to which I am not accustomed.

Crap, I take trig next year, I'm screwed if it's like this ..

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It gets worse my friend.Crap, I take trig next year, I'm screwed if it's like this ..

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On my iPhone T.. T.. Tapatalking away!

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Ratios in the triangle. It's painful stuff I know.

On my iPhone T.. T.. Tapatalking away!

Sorry dude, it's not coming to me. Anything I come up with seems wrong. It's been a long while since I did this last year.

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You are not alone in that area!I have trouble adding up my score on a golf hole.

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I got a headache just looking at the problem.

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It's not nearly as bad as it seems.Crap, I take trig next year, I'm screwed if it's like this ..

The answer is 8.

Right?

Right?

Pretty sure the answer is noThe answer is 8.

Right?

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I'm going with 8.Pretty sure the answer is no

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I'm changing my answer, its the 85 bears.I'm going with 8.

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Ditka will find a way to get it done.I'm changing my answer, its the 85 bears.

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minus 8.The answer is 8.

Right?