A-Level Edexcel C3 January 2009 Q4 : ExamSolutions

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when you diferentiate x = cos(2y +pi)
i was wondering could you not split it into 2 parts and then differentiate it ??
i guess not? becuse the answer's wrong :(

XxLilcindzxX
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Able to follow?lol. Ahh i haven't learned it yet, just checking it out. The Dx/Dy is on your web site right?

SvaJonny
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Isn't the gradient for the tangent going to be -1 divided by a half? As the product of the gradients is going to equal -1?

shnad
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@XxLilcindzxX oo nevermind
ii figuredd why
thanks for the video :)

XxLilcindzxX