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# Differentiation watch

1. Hi, how would you about differentiating siny wrt x?

Chain rule? I thought it might be cos(dy/dx) but it's not
2. Chain rule is the right way to go.

Think of it as sin y(x). Differentiate the sin bit first, then the y
3. (Original post by SimonM)
Chain rule is the right way to go.

Think of it as sin y(x). Differentiate the sin bit first, then the y
Wait what is the x? And I thought you couldn't use the chain rule with power 1 things. Ahh I don't know how to do trig.
4. i'm brighter than brightgirl at differentiation

5. (Original post by Pheylan)
i'm brighter than brightgirl at differentiation

so would it be cos y dy/dx ?
6. (Original post by Pheylan)
i'm brighter than brightgirl at differentiation

I think I understand ^that. Is that just to diff y wrt x, it's y differentiated and timesed by dy/dx.

But how do you make that work for siny.

Would it be... cosy dy/dx ? I don't knowwww
7. (Original post by choongsta)
so would it be cos y dy/dx ?
(Original post by BrightGirl)

I think I understand ^that. Is that just to diff y wrt x, it's y differentiated and timesed by dy/dx.

But how do you make that work for siny.

Would it be... cosy dy/dx ? I don't knowwww
8. (Original post by Pheylan)
Awesomeee
9. Thanks all

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