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**Wrencytet** · 05-21-2009, 07:19 PM

The derivative of cot(theta) is -csc^2(theta).
-[csc^2(theta)] = -[cot^2(theta)+1]

How do I move on from this? I need it in terms of sin, cos, or tan so I can resolve the simultaneous equation

I would love to help, but what you are asking is a REALLY fundamental question.

Look up what "cotangent", "secant" and "cosecant" really are. The very definition of those operators is the answer to your question.

Some advice, my friend, take it or leave it: You will never succeed in a Math course if you do not know the fundamentals. Getting the answer to this question handed to you will NOT help you one bit.

Good luck!

05-21-2009, 07:19 PM	#11
Wrencytet Join Date Oct 2005 Posts 457 Senior Member	The derivative of cot(theta) is -csc^2(theta). -[csc^2(theta)] = -[cot^2(theta)+1] How do I move on from this? I need it in terms of sin, cos, or tan so I can resolve the simultaneous equation I would love to help, but what you are asking is a REALLY fundamental question. Look up what "cotangent", "secant" and "cosecant" really are. The very definition of those operators is the answer to your question. Some advice, my friend, take it or leave it: You will never succeed in a Math course if you do not know the fundamentals. Getting the answer to this question handed to you will NOT help you one bit. Good luck!
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