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# what is dy/dx of cosec2y? watch

1. what is dy/dx of cosec2y

so i did

U=2y u'=2dy/dx
V=cosec2u v'=-2cosec2ucot2u

And times u' by v'

To get 2dy/dx X -2cosec2ucot2u

= -4cosec2ucot2udy/dx

Which is wrong apparently?

Any help ?

2. (Original post by christmaseve)
what is dy/dx of cosec2y

so i did

U=2y u'=2dy/dx
V=cosec2u v'=-2cosec2ucot2u

And times u' by v'

To get 2dy/dx X -2cosec2ucot2u

= -4cosec2ucot2udy/dx

Which is wrong apparently?

Any help ?

Don't you have anything more enjoyable to do on Christmas than writing equations?
3. (Original post by Josb)
Don't you have anything more enjoyable to do on Christmas than writing equations?
Don't you have anything more enjoyable to do than posting useless comments on an online forum?
4. (d/dx)f(y) = f'(y)(dy/dx)

To differentiate cosec(2y), use chain rule and the equation
(d/dx)cosec x = -cot x cosec x

5. (Original post by anonwinner)
Don't you have anything more enjoyable to do than posting useless comments on an online forum?
I'm driking champagne while surfing on TSR, it's fun;
6. (Original post by Josb)
I'm driking champagne while surfing on TSR, it's fun;
Sounds really fun bro
7. (Original post by shawn_o1)
(d/dx)f(y) = f'(y)(dy/dx)

To differentiate cosec(2y), use chain rule and the equation
(d/dx)cosec x = -cot x cosec x

Okay thankyou
8. (Original post by Josb)
Don't you have anything more enjoyable to do on Christmas than writing equations?

(Original post by Josb)
I'm driking champagne while surfing on TSR, it's fun;
I think both are fun.

I am doing maths and drinking red wine...

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Updated: December 25, 2014
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